WO2002009825A1 - Surface en gazon synthetique - Google Patents

Surface en gazon synthetique Download PDF

Info

Publication number
WO2002009825A1
WO2002009825A1 PCT/AU2001/000939 AU0100939W WO0209825A1 WO 2002009825 A1 WO2002009825 A1 WO 2002009825A1 AU 0100939 W AU0100939 W AU 0100939W WO 0209825 A1 WO0209825 A1 WO 0209825A1
Authority
WO
WIPO (PCT)
Prior art keywords
underlay
layer
synthetic
grass
particulate filler
Prior art date
Application number
PCT/AU2001/000939
Other languages
English (en)
Inventor
Bruce Russell Warwick
Carolyn Elizabeth Balderson
Kevin James Schaumberg
Original Assignee
Professional Golf Solutions Pty Ltd
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 Professional Golf Solutions Pty Ltd filed Critical Professional Golf Solutions Pty Ltd
Priority to AU7739201A priority Critical patent/AU7739201A/xx
Priority to AU2001277392A priority patent/AU2001277392B2/en
Publication of WO2002009825A1 publication Critical patent/WO2002009825A1/fr

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B67/00—Sporting games or accessories therefor, not provided for in groups A63B1/00 - A63B65/00
    • A63B67/02—Special golf games, e.g. miniature golf or golf putting games played on putting tracks; putting practice apparatus having an elongated platform as a putting track
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/36—Training appliances or apparatus for special sports for golf
    • A63B69/3661—Mats for golf practice, e.g. mats having a simulated turf, a practice tee or a green area
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63C—SKATES; SKIS; ROLLER SKATES; DESIGN OR LAYOUT OF COURTS, RINKS OR THE LIKE
    • A63C19/00—Design or layout of playing courts, rinks, bowling greens or areas for water-skiing; Covers therefor
    • A63C19/04—Mats or carpets for courts
    • 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 an underlay for a synthetic grass layer.
  • the present invention also relates to a synthetic grass surface formed from the underlay and the synthetic grass layer.
  • the present invention relates to a synthetic golf green.
  • the present invention will be described with particular reference to a synthetic grass surface for playing the game of golf.
  • the surface may be used for playing of other sports or games and no limitation is intended thereby.
  • Natural grass surfaces are traditionally used for playing a wide variety of sports. Strains of grasses and techniques for planting, growing and maintaining grass surfaces have been developed to provide surfaces which match the particular requirements of a specific sport. For example, surfaces upon which contact sports are played must provide a certain degree of impact resistance as opposed to a harder surface such as cricket pitches or tennis courts where ball bounce is important.
  • a disadvantage of a natural grass surface is the level of maintenance required to keep the surface at an optimum playing condition. Maintenance includes regular watering, fertilizing, applying pest control formulations such as insecticides, applying herbicides, top dressing and in some cases rolling. Providing sufficient water to maintain the grass in an optimum healthy condition may be a particular problem in arid areas where water supply is limited. Still further, natural grass cannot tolerate low light levels, frost and overuse.
  • Synthetic grass surfaces are essentially a carpet like material in which imitation grass pile is stitched onto a backing layer.
  • the surface In order for a synthetic grass surface to be acceptable it is desirable that the surface not only looks like grass but also simulates other properties of a natural grass surface. Such properties include ball bounce, impact absorbance (essential for contact sports and/or when players run on the surface), ball holding ability (which determines the speed at which a ball travels over the surface). These properties can vary considerably between different sports.
  • Ball bounce is important as on a golf range balls are generally chipped onto the green. It is desirable that the ball bounces two or three times in a controlled manner before coming to rest. If the ball bounces too much and in an uncontrolled manner it is not possible for the golfer to control the approach shot.
  • an underlay for a synthetic grass layer including a layer of a resilient material having an upper surface with a plurality of indentations, wherein the indentations are at least partially filled with a particulate filler.
  • the resilient material may be any suitable material and is typically an elastomeric plastics material such as natural rubber, synthetic rubbers including styrene butadiene rubbers, neoprene rubbers, polyurethane, ethylene vinyl acetate copolymers, polyesters, polyethers and poly vinylchloride.
  • a particularly preferred material is a poly-ether urethane foam.
  • the thickness and density of the foam may be varied if desired so as to modify the resilient properties of the synthetic grass surface including the underlay.
  • the desirable resilient properties may vary with the types of sport to be played thereon.
  • the resilient material typically has a density of between about 10 to about 40KgM 3 and typically between about 27 to about 33KgM 3 .
  • the thickness of the foam is typically between about 10 to about 50mm, preferably between about 20 to about 30mm.
  • the resilient layer is typically a convoluted foam.
  • the dimensions of the convolutions may be varied according to the desired properties of the final surface. When used in the construction of a golf green it is preferred that the convolutions have a diameter less than the diameter of a golf ball.
  • the diameter of the convolutions is between about 20 to about 37mm.
  • a preferred convoluted foam for use in a synthetic golf green would have convolutions of this diameter and a peak to valley depth of between about 5 to about 20, preferably between about 7 to about 13mm.
  • the indentations are at least partially filled, preferably completely filled with a particulate filler.
  • the filler is typically inorganic filler such as sand, or silica.
  • the average particle size may be varied depending upon the degree of bounce desired for the surface. This will of course depend upon the sport to be played on that surface. For a golf green, a preferred particle size range is between about 0.47 to about 0.81mm, preferably between about 0.56 to about 0.70mm. It is preferred that only a single size fraction of a particulate filler is used. The use of multiple size fractions or aggregates can lead to compaction of the filler. This can result in an unacceptable hardening of the surface.
  • the resilient layer is coated with a sealant.
  • the sealant may also protect the layer from any abrasion by the sand. Any suitable coating layer may be used which is compatible with the material from which the resilient layer is formed. Typically, the sealant is water resistant.
  • the underlay is typically placed on a base formed from known base materials such as crusher dust, road base or sand blended with cement. The typical minimum depth of the base layer is about 75mm. The base need not be flat and may be shaped to any shape or contour which may be desired for example in the construction of a golf green. An artificial grass layer may then be laid over the resilient layer.
  • a synthetic grass surface comprising an underlay of the first broad from and an upper layer of a synthetic grass.
  • the synthetic grass layer may be a conventional type of synthetic grass carpet.
  • Typical synthetic grasses for use on golf greens have a pile height of about 12-13mm and a machine gauge (distance between rows of about 3/16" (5mm). It is conventional practice to topdress synthetic grass surfaces for use in applications such as golf, bowling greens and tennis courts with a compacting particulate filler. The topdressing supports the synthetic fibers and maintains them in an upright manner. Topdressing also counteracts the tendency of conventional synthetic grasses to lay in a particular direction. (This can adversely affect the run of a ball).
  • the pile elements typically have a characteristic bias or tendency to lie in a particular direction which is related to the direction the material passed through the production machinery.
  • Topdressing also imparts a degree of hardness to the surface which is desirable for ball bounce.
  • Conventional practice has been to use a sand or silica infill of different size fractions. The purpose of using the different size fractions is that this allows compaction of the particles and hardening of the surface.
  • a novel synthetic grass having improved performance may be constructed by providing a synthetic grass with an increased pile height in combination with an infill material having a single size fraction. Whilst not wishing to be bound by theory it is believed that by providing an increased amount of a noncompacting infill material that an improved surface may be obtained. The increased pile height allows the synthetic grass of the present invention to hold a larger amount of infill material than conventional grass surfaces.
  • a synthetic grass comprising a pile fabric having a backing layer and normally upstanding pile elements, the pile elements having a height of between about 13 to about 30mm and a top dressing layer of a particulate filler having a particle size of between about 0.81 to about 0.47mm.
  • the pile height is preferably about 25mm.
  • the pile is tufted.
  • a pile height of 25 mm would normally relax to about 20mm. Tufting of the piles may assists in stabilizing the top dressing against shifting and may also assist in rolling of a golf ball across the surface.
  • the pile is crimped and in a particularly preferred from of the invention, the yarn is of the knit de knit type. In the knit de knit process a yarn end is tightly knit into a tubular prefabric, the stitch is heat set, and the prefabric is then unraveled (deknit) and taken up onto a yarn carrier. Treated in this manner the resulting yarn has a characteristic texture and bulk, or "crinkle".
  • a knit de knit type yarn can provide a non-directional pile surface as opposed to the inherent bias in conventional type yarns as referred to above. This lack of bias assists in the golf ball maintaining a correct line when putted.
  • the synthetic grass has a gauge of up to about 3/8"
  • the synthetic grass layer of the present invention has been observed to be particularly suitable for use with the underlay of the first broad from of the invention.
  • the infill has substantially the same particle size as the particulate filler which at least partially fills the indentations in the upper surface of the underlay.
  • a method of constructing a synthetic grass surface comprising the steps of: providing a base layer, forming an underlay of a resilient material having an upper surface with a plurality of indentations, at least partially filling the indentations with a particulate filler and laying the underlay over the base, laying a top layer of a synthetic grass over the underlay and placing a particulate infill material on the grass layer.
  • the figure illustrates a preferred synthetic surface 11 of the present invention in the form of a golf green.
  • the surface 11 includes a preferred underlay 12 of the present invention in association with a preferred synthetic grass 13 of a further form of the invention.
  • the surface 11 has a base 14 formed from a layer of about 75mm compacted crusher dust.
  • the underlay 12 is formed from a convoluted foam material having a series of convolutions 15 on the upper surface thereof.
  • the foam is a semi-closed cell polyether-urethane foam material having a density of about 29KgM 3 .
  • the foam has a depth of 25mm and the height of the convolutions (peak to valley height) is about 10mm.
  • the convolutions 15 have a diameter of between about 37 and about 28mm.
  • the foam is coated with a sealant material comprising an aqueous polymer consisting of a carboxylated styrene/butadiene and poly- isoprene formulated with calcium carbonate and special ceramic fillers.
  • the convolutions 15 are filled with pure graded silica 20 which has been kiln dried and washed.
  • the silica has an effective size of between about 0.76 to about 0.70mm and a uniform co-efficient of less than 1.5mm, a specific gravity of about 2.6 and a bulk density of about 1.5M 3 .
  • the grass layer 13 has a backing layer 16 comprising a primary polypropylene backing layer and a secondary layer formed from a carboxylated self curing styrene butadiene rubber latex.
  • the grass surface has synthetic grass piles 17 stitched into the backing 16.
  • the pile has a tufted height of about 25mm and due to relaxation of the yarn the finished height is 20mm.
  • the yarn is a knit de knit style yarn.
  • the stitch rate is 190 per meter and the machine gauge is 3/8" (5mm) and the lineal density is 840 Tex (7600 denier).
  • the pile 17 is filled to a depth of about 17 to about 18mm with the same filler 20a is used to fill the convolutions in the underlay.
  • the top 5mm is filled with a layer of green sand, for aesthetic reasons.
  • the procedure for laying the golf green is as follows:
  • the base is formed from crusher dust, watered and compacted.
  • the base may be formed on a ground surface having any desirable contour suitable for a golf green.
  • the coated underlay is then laid over the base and conforms to the contour of the base.
  • the underlay is then filled with the infill to the top of the peaks of the convolutions and leveled.
  • the synthetic grass layer is then laid over the underlay and joined with tape at the seams, anchored and buried into the ground around the perimeter.
  • the synthetic grass is then filled with infill to about 17 to about 18mm, then topped with green sand fill to the desired level. (When filled to a high level, there is less pile protruding above the infill. In this case the speed of the green is faster than when the tips of the pile are protruding a greater amount).
  • the golf green laid according to the above procedure has been observed to provide a surface which can emulate a natural grass green both when a ball is chipped onto the green and during putting.
  • the ball typically bounces two or three time in a controlled manner and then rolls on in a similar manner to a natural golf green before stopping.
  • the presence of the particulate filler in the convolutions in the foam layer provides a dampening effect between the grass and the underlay, whilst providing sufficient rigidity for the ball to roll on in a natural manner after the final bounce.
  • the result is a surface with desirable energy absorbing properties.
  • the surface is sufficiently hard and the synthetic grass pile is non-biased such that the ball can maintain a correct line once putted and will not roll too far.

Abstract

L'invention se rapporte à une sous-couche (12) pour surface en gazon synthétique destinée à un green de golf, qui comporte une couche de matériau élastique (12) fabriqué à partir de plastiques élastomères du type caoutchouc, polyuréthanne, polyesters, polyéthers, PVC et mousse. Ledit matériau élastique a une densité comprise entre 10 et 40 KgM3, une épaisseur comprise entre 10 et 50 mm et une surface supérieure présentant une pluralité de dentelures ou circonvolutions (15) qui possèdent un diamètre compris entre 20 et 37 mm et une profondeur de crête à vallée comprise entre 5 et 20 mm. Ces dentelures ou circonvolutions sont partiellement remplies d'une charge de remplissage particulaire telle que la silice (20), ayant une taille de particules comprise entre 0,47 et 0,81 mm. Une couche supérieure de gazon synthétique possède une couche dossier (16), une pluralité d'éléments (17) à poils longs dressés d'une longueur de 13 à 30 mm attachés à la couche dossier (16) et une couche supérieure d'habillage (13) de la charge de remplissage qui est utilisée avec la sous-couche pour créer une surface de jeu synthétique (11). Cette surface de jeu (11) est suffisamment élastique pour qu'une balle rebondisse de manière contrôlée et suffisamment dure pour constituer une surface de putting acceptable.
PCT/AU2001/000939 2000-08-02 2001-08-01 Surface en gazon synthetique WO2002009825A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU7739201A AU7739201A (en) 2000-08-02 2001-08-01 A synthetic grass surface
AU2001277392A AU2001277392B2 (en) 2000-08-02 2001-08-01 A synthetic grass surface

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPQ9144A AUPQ914400A0 (en) 2000-08-02 2000-08-02 A synthetic grass surface
AUPQ9144 2000-08-02

Publications (1)

Publication Number Publication Date
WO2002009825A1 true WO2002009825A1 (fr) 2002-02-07

Family

ID=3823202

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2001/000939 WO2002009825A1 (fr) 2000-08-02 2001-08-01 Surface en gazon synthetique

Country Status (2)

Country Link
AU (1) AUPQ914400A0 (fr)
WO (1) WO2002009825A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2247886A1 (es) * 2003-10-03 2006-03-01 Mondo Tufting, S.A. Cesped artificial para campo de golf.
EP1647577A1 (fr) * 2004-10-14 2006-04-19 A.P.I. Applicazioni Plastiche Industriali S.P.A. Particles elastomères pour le remplissage du gazon artficiel
GB2429171A (en) * 2005-08-17 2007-02-21 Edel Grass B V Artificial turf
WO2007061289A1 (fr) * 2005-11-22 2007-05-31 Arcadis Regio B.V. Terrain de sport
WO2008055878A1 (fr) * 2006-11-07 2008-05-15 Pietro Cogliati Green artificiel présentant des propriétés anélastiques
JP2009513058A (ja) * 2005-10-31 2009-03-26 エルジー エレクトロニクス インコーポレイティド 移動通信端末のデータ受信方法
US7585555B2 (en) * 2005-12-23 2009-09-08 Mondo S.P.A. Synthetic-grass flooring and method for laying same
EP2154291A1 (fr) * 2008-08-15 2010-02-17 Notts Sport Limited Surface de jeu et son procédé de fabrication
CN101440596B (zh) * 2007-11-23 2011-07-27 李謦宇 组合式人工运动草垫及加工方法
EP2298996A3 (fr) * 2007-01-19 2012-05-09 Brock International Base de système de gazon
US8353640B2 (en) 2008-01-22 2013-01-15 Brock Usa, Llc Load supporting panel having impact absorbing structure
US8662787B2 (en) 2007-01-19 2014-03-04 Brock Usa, Llc Structural underlayment support system for use with paving and flooring elements
US9011740B2 (en) 2008-12-15 2015-04-21 Textile Management Associates, Inc. Method of recycling synthetic turf and infill product
US9516573B2 (en) 2005-10-31 2016-12-06 Lg Electronics Inc. Data transfer management in a radio communications network
US10060082B2 (en) 2016-05-18 2018-08-28 Brock Usa, Llc Base for turf system with vertical support extensions at panel edges
USD866800S1 (en) 2015-10-26 2019-11-12 Brock Usa, Llc Turf underlayment
WO2022108416A1 (fr) * 2020-11-23 2022-05-27 주식회사 골프존 Tapis de rough

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337283A (en) * 1980-09-11 1982-06-29 Haas Jr Frederick T Synthetic turf playing surface with resilient top-dressing
GB2142353A (en) * 1983-06-28 1985-01-16 Norman Wharton Shock pad for synthetic sports turf
US4497853A (en) * 1984-02-09 1985-02-05 Tomarin Seymour A Synthetic turf carpet game playing surface
US4505960A (en) * 1983-08-12 1985-03-19 Monsanto Company Unitary shock-absorbing polymeric pad for artificial turf
GB2204801A (en) * 1987-04-15 1988-11-23 Anglian Sportsturf Limited Artificial playing surfaces

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4337283A (en) * 1980-09-11 1982-06-29 Haas Jr Frederick T Synthetic turf playing surface with resilient top-dressing
GB2142353A (en) * 1983-06-28 1985-01-16 Norman Wharton Shock pad for synthetic sports turf
US4505960A (en) * 1983-08-12 1985-03-19 Monsanto Company Unitary shock-absorbing polymeric pad for artificial turf
US4497853A (en) * 1984-02-09 1985-02-05 Tomarin Seymour A Synthetic turf carpet game playing surface
GB2204801A (en) * 1987-04-15 1988-11-23 Anglian Sportsturf Limited Artificial playing surfaces

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2247886A1 (es) * 2003-10-03 2006-03-01 Mondo Tufting, S.A. Cesped artificial para campo de golf.
EP1647577A1 (fr) * 2004-10-14 2006-04-19 A.P.I. Applicazioni Plastiche Industriali S.P.A. Particles elastomères pour le remplissage du gazon artficiel
GB2429171A (en) * 2005-08-17 2007-02-21 Edel Grass B V Artificial turf
USRE46714E1 (en) 2005-10-31 2018-02-13 Evolved Wireless Llc Method of transmitting and receiving radio access information in a wireless mobile communications system
JP2009513058A (ja) * 2005-10-31 2009-03-26 エルジー エレクトロニクス インコーポレイティド 移動通信端末のデータ受信方法
USRE48478E1 (en) 2005-10-31 2021-03-16 Evolved Wireless Llc Method of transmitting and receiving radio access information in a wireless mobile communications system
USRE48326E1 (en) 2005-10-31 2020-11-24 Evolved Wireless Llc Method of transmitting and receiving radio access information in a wireless mobile communications system
US10129795B2 (en) 2005-10-31 2018-11-13 Lg Electronics Inc. Data transfer management in a radio communications network
US8219097B2 (en) 2005-10-31 2012-07-10 Lg Electronics Inc. Method of transmitting and receiving radio access information in a wireless mobile communications system
US9930580B2 (en) 2005-10-31 2018-03-27 Lg Electronics Inc. Data transfer management in a radio communications network
USRE46679E1 (en) 2005-10-31 2018-01-16 Evolved Wireless Llc Method of transmitting and receiving radio access information in a wireless mobile communications system
USRE46602E1 (en) 2005-10-31 2017-11-07 Evolved Wireless Llc Method of transmitting and receiving radio access information in a wireless mobile communications system
US9516573B2 (en) 2005-10-31 2016-12-06 Lg Electronics Inc. Data transfer management in a radio communications network
WO2007061289A1 (fr) * 2005-11-22 2007-05-31 Arcadis Regio B.V. Terrain de sport
US7585555B2 (en) * 2005-12-23 2009-09-08 Mondo S.P.A. Synthetic-grass flooring and method for laying same
WO2008055878A1 (fr) * 2006-11-07 2008-05-15 Pietro Cogliati Green artificiel présentant des propriétés anélastiques
US8967905B2 (en) 2007-01-19 2015-03-03 Brock Usa, Llc Structural underlayment support system and panel for use with paving and flooring elements
US8568840B2 (en) 2007-01-19 2013-10-29 Brock Usa, Llc Base for turf system
EP2298996A3 (fr) * 2007-01-19 2012-05-09 Brock International Base de système de gazon
US8662787B2 (en) 2007-01-19 2014-03-04 Brock Usa, Llc Structural underlayment support system for use with paving and flooring elements
US9567714B2 (en) 2007-01-19 2017-02-14 Brock Usa, Llc Structural underlayment support system and panel for use with paving and flooring elements
US9631326B2 (en) 2007-01-19 2017-04-25 Brock Usa, Llc Underlayment panel having drainage channels
US9771692B2 (en) 2007-01-19 2017-09-26 Brock Usa, Llc Base for turf system
US8827590B2 (en) 2007-01-19 2014-09-09 Brock Usa Structural underlayment support system and panel for use with paving and flooring elements
CN101440596B (zh) * 2007-11-23 2011-07-27 李謦宇 组合式人工运动草垫及加工方法
US8967906B2 (en) 2008-01-22 2015-03-03 Brock Usa, Llc Underlayment panel having drainage channels
US8353640B2 (en) 2008-01-22 2013-01-15 Brock Usa, Llc Load supporting panel having impact absorbing structure
US9394651B2 (en) 2008-01-22 2016-07-19 Brock Usa, Llc Underlayment panel having drainage channels
EP2154291A1 (fr) * 2008-08-15 2010-02-17 Notts Sport Limited Surface de jeu et son procédé de fabrication
US9011740B2 (en) 2008-12-15 2015-04-21 Textile Management Associates, Inc. Method of recycling synthetic turf and infill product
USD866800S1 (en) 2015-10-26 2019-11-12 Brock Usa, Llc Turf underlayment
US10060082B2 (en) 2016-05-18 2018-08-28 Brock Usa, Llc Base for turf system with vertical support extensions at panel edges
WO2022108416A1 (fr) * 2020-11-23 2022-05-27 주식회사 골프존 Tapis de rough
KR20220070940A (ko) * 2020-11-23 2022-05-31 주식회사 골프존 러프 매트
KR102451942B1 (ko) * 2020-11-23 2022-10-07 주식회사 골프존 러프 매트

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