US20080124496A1 - Artificial turf with granule retaining fibers - Google Patents
Artificial turf with granule retaining fibers Download PDFInfo
- Publication number
- US20080124496A1 US20080124496A1 US12/026,866 US2686608A US2008124496A1 US 20080124496 A1 US20080124496 A1 US 20080124496A1 US 2686608 A US2686608 A US 2686608A US 2008124496 A1 US2008124496 A1 US 2008124496A1
- Authority
- US
- United States
- Prior art keywords
- fibers
- turf
- recited
- fiber
- height
- 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.)
- Abandoned
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Classifications
-
- A—HUMAN NECESSITIES
- A41—WEARING APPAREL
- A41G—ARTIFICIAL FLOWERS; WIGS; MASKS; FEATHERS
- A41G1/00—Artificial flowers, fruit, leaves, or trees; Garlands
- A41G1/009—Artificial grass
-
- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05C—EMBROIDERING; TUFTING
- D05C17/00—Embroidered or tufted products; Base fabrics specially adapted for embroidered work; Inserts for producing surface irregularities in embroidered products
- D05C17/02—Tufted products
Abstract
Description
- The present invention relates generally to artificial turf, and more particularly to an artificial turf including a plurality of groups, of fibers, each group including both straight and non-linear fibers sewn into a backing through a common opening, with the non-linear fibers providing captivation of granular infill.
- Artificial turf is used in a variety of areas, such as on athlete playing fields for football, soccer, baseball, tennis, etc. The artificial turf is usually made to simulate a natural grass field. U.S. Pat. No. 5,601,886 by Ishikawa et al. describes an artificial turf consisting of alternate rows of longer and shorter artificial grass filaments sewn into a backing. A layer of sand is deposited into the artificial turf so as to cover the shorter filaments. A disadvantage of this structure is that the sand infill tends to compact and harden, and has an abrasive quality.
- U.S. Pat. No. 4,396,653 by Tomarin discloses sewing pile fibers into a backing, and then depositing a bottom layer of rubber-like particles, and then a binder for gluing some of the particles together. A second layer of sand is then deposited over the first layer wherein the depth of the first and second layers is less than the height of the pile fiber.
- U.S. Pat. No. 6,527,889 by Paschal et al describes a structure that appears similar in purpose to that of Tomarin's, wherein the rubber particles of a first bottom layer are coated with a bonding agent. Application of water to the layer then activates the bonding agent for adhering the particles together. A second, top layer of rubber particles is then deposited over the bottom layer.
- U.S. Pat. No. 6,299,959 by Squires et al. discloses a grass-like surface formed with polyethylene co-polymer slit fibers tufted through a fiberglass reinforced backing. Three layers of infill are then deposited. The bottom layer is rubber granules, and the top two layers are each a mixture of rubber and sand.
- The above described patents using rubber granules or rubber and sand mixtures provide a more resilient, shock absorbent surface. A disadvantage is that some of the rubber particles become air-borne upon impact with the turf. For example, football players impact turf with shoulders and helmets, etc., bringing the player's faces close or in contact with the turf. The small “rubber granules” are often created by grinding up used automobile tires, and include the various components, including natural and synthetic rubber and ground up steel belt. These finely ground particles can be ingested by players, and may be a health hazard, or at least a potential irritant.
- It is an advantage of this invention in that it provides an artificial turf having an improved stability.
- It is a further advantage of this invention in that it provides a combination of good shock absorption with stability of rubber infill.
- It is a still further advantage of this invention in that it provides improved retainment of rubber infill in combination with good shock absorption, and reduces the quantity of infill that escapes into the air above the turf.
- In one embodiment of this invention, an artificial turf is provided that resists migration of rubber infill into the space above the turf. Artificial grass is attached to and extends upward from a backing material, which may be one or more layers. The artificial grass includes groups of at least two different kinds of fiber sewn through a common path in the backing material. One of the kinds of fibers is an artificial grass blade shaped so as to appear like a blade of grass. The other kind of fiber in each group is pre-stressed/crimped so that the relaxed shape of the fiber is nonlinear, resembling a curlicued or articulated form having lateral excursions. The lateral excursions cause portions of one such pre-stressed fiber to overlap and interfere with another, forming a mesh. The height of the pre-stressed fibers in their relaxed state in the turf is less than the height of the relatively unstressed fiber(s). Resilient granules are embedded in the mesh, and are captivated by the interfering pre-stressed fibers. In one embodiment, the pre-stressed fiber is constructed of nylon material, and the relatively unstressed artificial grass blade of polyethylene.
-
FIG. 1 illustrates an artificial turf according to the present invention; -
FIG. 2 illustrates two fibers through one needle, and fiber tension; -
FIG. 3 is a table of example dimensions of fiber and infill height; -
FIG. 4A shows one type of artificial grass fiber construction; and -
FIG. 4B shows the fiber ofFIG. 4A rolled up. - While the present invention will be described herein with reference to particular embodiments thereof, a latitude of modifications, various changes and substitutions are intended, and it will be appreciated that in some instances some features of the invention will be employed without a corresponding use of other features without departing from the spirit and scope of the invention as described with respect to the preferred embodiments set forth herein.
- Referring now to
FIG. 1 of the drawing, theartificial turf 10 of the present invention is illustrated. Abacking material 12 has two different kinds offiber fiber same passages 18 in thebacking 12.Fiber 14 is an artificial grass blade that can be constructed in a number of ways to give the turf a grass like appearance. Fiber 16 is pre-stressed into a non-linear shape, creating a mesh for retaininginfill 24. Thetops fiber 14 appearing grass-like. Thefibers 14 are relatively un-stressed and have only minor deviations from linearity, similar to a linear/straight grass blade appearance. Fibers 16 are pre-stressed prior to being sewn into the backing. During the sewing process,fibers same openings 18 in the backing through which the needle is inserted. Axial/longitudinal tension on thefibers fibers fibers 16 are held in an uncrimped, straight line. Upon being sewn into thebacking 12, the tension onfiber 16 is released and it returns to its pre-stressed/crimped condition, that could be described as curlicued. The lateral/horizontal excursions such as excursion “x” of thefibers 16 provide resistance to migration ofparticles 24 placed in the artificial turf, which most commonly are ground up used tires, the resulting granules having a resilient, shock absorbing characteristic. - In one embodiment, the
fibers 14 are constructed of polyethylene andfibers 16 of nylon. The polyethylene has a slick surface which helps avoid injury from, for example a football player twisting an ankle due to turf resistance/friction. The dimensions of the stitch spacing S and row spacing R, are selected along with the design of the pre-stressed shape of thefiber 16, so that lateral excursions of afiber 16 from onepassage 18 overlap the excursions of afiber 16 from anadjacent passage 18. In this way, an effective mesh offiber 16 is formed that resists migration of therubber particles 24, both upward and horizontally. -
FIG. 2 is provided to illustrate the tension applied to thefibers fibers needle 28 is inserted through thebacking 12, taking bothfibers common passage 18. Ahook 30 grabs the loop of fibers and keeps the fibers from retracting back through thepassage 18 as theneedle 28 is retracted. The sewing machinery then inserts theneedle 30 through the backing again at a stitch space “S” (FIG. 1 ) from thefirst space 18 and thehook 30 grabs the material again. A cutting tool (not shown) follows along or is integrated with thehook apparatus 30 and cuts the loop ends 32, at which time the tension on thecut fiber 16 is released and thefiber 16 returns to its curlicued/non-linear state as shown inFIG. 1 . - In one embodiment, the
fibers 14 are constructed of polyethylene, and extend upward from the backing a distance H1 of approximately 3 inches. The retracted, rest state curlicuedfibers 16 extend upward from the backing a distance H2 of approximately 21 inches. The height H3 of therubber infill granules 24 in this particular embodiment is approximately 1¾ inches. This combination of heights and other examples are listed inFIG. 3 . Other dimensions are also included in the spirit of the present invention, as will be apparent to those skilled in the art. In general, the height H2 of thecurlicued fiber 16 must be shorter than the height of the relativelystraight fiber 14, and the height of the infill H3 is less than the height H2 in order to optimize the captivation of the granules, but can also be somewhat higher, particularly if a different granule material is used above thefibers 16 that is less irritating to those who play on the turf. - As described above, the
straight fiber 14 may be constructed from polyethylene, which provides a slippery surface similar to grass. Other materials that simulate the grass-like property of low resistance/friction are also included in the spirit of the present invention. Thenylon fiber 16 is selected for its resiliency and ability to hold thegranules 24 in the turf. Other materials forfiber 16 that will retain the granules in a similar way are also included in the present invention. - The grass-
like fibers 14 can be constructed in a variety of ways that will be apparent to those skilled in the art for use in the turf of the present invention, and the present invention includes the use of these constructions in the turf structure as described in reference to the figures of the present disclosure.FIG. 4A illustrates the construction of one type of grass-like structure for use as an artificial grass blade. A length of polyethylene or other material of width “W” is sliced through in places 38 as indicated. The material is then rolled up, or pre-stressed to automatically roll up, as indicated inFIG. 4B , and when sewn into an artificial turf backing it resembles a blade of grass. - The
granules 24 made by grinding up used tires are an example of resilient material that can be used as an infill. Other materials that provide a shock absorbing layer are also included in the present invention, including mixtures of resilient and non-resilient granules, such as a mixture of sand and rubber granules, etc. - While the present invention has been described herein with reference to particular embodiments thereof, a latitude of modifications, various changes and substitutions are intended in the foregoing disclosure, and it will be appreciated that in some instances some features of the invention will be employed without a corresponding use of other features without departing from the spirit and scope of the invention as set forth in the appended claims.
Claims (20)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US12/026,866 US20080124496A1 (en) | 2003-12-10 | 2008-02-06 | Artificial turf with granule retaining fibers |
US12/896,237 US20110020567A1 (en) | 2003-12-10 | 2010-10-01 | Artificial turf with granule retaining fibers |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US73380603A | 2003-12-10 | 2003-12-10 | |
US12/026,866 US20080124496A1 (en) | 2003-12-10 | 2008-02-06 | Artificial turf with granule retaining fibers |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US73380603A Continuation | 2003-12-10 | 2003-12-10 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/896,237 Continuation US20110020567A1 (en) | 2003-12-10 | 2010-10-01 | Artificial turf with granule retaining fibers |
Publications (1)
Publication Number | Publication Date |
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US20080124496A1 true US20080124496A1 (en) | 2008-05-29 |
Family
ID=39464034
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/026,866 Abandoned US20080124496A1 (en) | 2003-12-10 | 2008-02-06 | Artificial turf with granule retaining fibers |
US12/896,237 Abandoned US20110020567A1 (en) | 2003-12-10 | 2010-10-01 | Artificial turf with granule retaining fibers |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
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US12/896,237 Abandoned US20110020567A1 (en) | 2003-12-10 | 2010-10-01 | Artificial turf with granule retaining fibers |
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US (2) | US20080124496A1 (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060204710A1 (en) * | 2002-12-19 | 2006-09-14 | De Vries Hugo | Artificial turf mat and method for manufacturing thereof |
US20080187689A1 (en) * | 2007-02-07 | 2008-08-07 | Domo N.V. | Artificial turf |
US20080260974A1 (en) * | 2007-04-19 | 2008-10-23 | Motech Gmbh Technology & Systems | Artificial turf |
US20080268184A1 (en) * | 2007-04-30 | 2008-10-30 | Charles Cook | Synthetic sports turf having lowered infill levels |
US20090162578A1 (en) * | 2005-02-28 | 2009-06-25 | Jeroen Albert Van Balen | Artificial Grass Turf System |
US20090208674A1 (en) * | 2007-10-03 | 2009-08-20 | Fieldturf Tarkett Inc. | Modular synthetic grass turf assembly |
US20100105497A1 (en) * | 2003-12-10 | 2010-04-29 | Textile Management Associates, Inc. | Golf mat |
US20100166984A1 (en) * | 2007-04-12 | 2010-07-01 | Roberto Nusca | Method for producing synthetic turfs |
US20110020567A1 (en) * | 2003-12-10 | 2011-01-27 | Textile Management Associates, Inc. | Artificial turf with granule retaining fibers |
US20120189786A1 (en) * | 2009-08-27 | 2012-07-26 | Mar. Project S.R.L. | Infill material for synthetic turfs and synthetic turfs so obtained |
US20150167254A1 (en) * | 2013-12-13 | 2015-06-18 | Orotex Belgium Nv | Artificial turf for landscape and sports |
US9267232B2 (en) * | 2005-03-24 | 2016-02-23 | Tarkett Inc. | Synthetic turf system having an infill trapping structure |
US10370799B2 (en) | 2013-12-13 | 2019-08-06 | Dfs Europe Nv | Tufted structure for landscape and sports |
US20200308777A1 (en) * | 2017-11-03 | 2020-10-01 | Polytex Sportbelage Produktions-Gmbh | Artificial turf fiber with a non-circular cladding |
WO2021216800A1 (en) * | 2020-04-23 | 2021-10-28 | Watershed Geosynthetics, LLC | Tufted geotextile with intermediate diverter tufts for increased resistance to infill displacement |
US20210404127A1 (en) * | 2015-03-09 | 2021-12-30 | 4427017 Canada Inc. | Artificial turf free of infill material |
US20210404126A1 (en) * | 2015-03-09 | 2021-12-30 | 4427017 Canada Inc. | Artificial turf with textured hydrophilic fibers |
US11851796B2 (en) | 2016-02-09 | 2023-12-26 | Columbia Insurance Company | Carpet products and methods of making same |
EP4303351A1 (en) | 2022-07-04 | 2024-01-10 | Don & Low Limited | Improvements in or relating to artificial surfaces |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6750332B2 (en) * | 2016-06-15 | 2020-09-02 | 住友ゴム工業株式会社 | Manufacturing method of greening mat |
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Owner name: AVERY SPORTS TURF, INC., A DELAWARE CORPORATION, M Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AVERY, GEORGE S.;REEL/FRAME:023743/0525 Effective date: 20040119 Owner name: AVERY SPORTS TURF, INC., A GEORGIA CORPORATION, GE Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AVERY SPORTS TURF, INC, A DELAWARE CORPORATION;REEL/FRAME:023743/0636 Effective date: 20060303 Owner name: TEXTILE MANAGEMENT ASSOCIATES, INC., GEORGIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:AVERY SPORTS TURF, INC., A GEORGIA CORPORATION;REEL/FRAME:023743/0714 Effective date: 20060308 |
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