EP1828449B1 - Artificial grass built up of fibres that consist of a core and a cladding, as well as an artificial lawn built therefrom - Google Patents

Artificial grass built up of fibres that consist of a core and a cladding, as well as an artificial lawn built therefrom Download PDF

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Publication number
EP1828449B1
EP1828449B1 EP05825919A EP05825919A EP1828449B1 EP 1828449 B1 EP1828449 B1 EP 1828449B1 EP 05825919 A EP05825919 A EP 05825919A EP 05825919 A EP05825919 A EP 05825919A EP 1828449 B1 EP1828449 B1 EP 1828449B1
Authority
EP
European Patent Office
Prior art keywords
cladding
core
artificial grass
artificial
grass according
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.)
Not-in-force
Application number
EP05825919A
Other languages
German (de)
French (fr)
Other versions
EP1828449A1 (en
Inventor
Peter Van Reijen
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.)
Tapijtfabriek H Desseaux NV
Original Assignee
Tapijtfabriek H Desseaux NV
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 Tapijtfabriek H Desseaux NV filed Critical Tapijtfabriek H Desseaux NV
Publication of EP1828449A1 publication Critical patent/EP1828449A1/en
Application granted granted Critical
Publication of EP1828449B1 publication Critical patent/EP1828449B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/06—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyolefin as constituent
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/12—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyamide as constituent
    • 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 material used for the artificial grass is a soft material, for example, which has a large elastic range. Such a property makes for a good resilience, but also a high degree of friction, which latter aspect will lead to excessive adhesion of the skin to the artificial grass when a sliding tackle is made, and thus to inevitable damage to the skin, which is undesirable. Said materials are evaluated as unsatisfactory as regards the heat development that takes place when a sliding tackle is made, in spite of the fact that because of the high degree of friction the period of contact between the skin and the artificial grass remains limited.

Description

  • The present invention relates to an artificial grass built up of fibres that consist of a core and a cladding, which core and which cladding are composed of a plastic material.
  • Such a type of artificial grass is known per se from European patent EP 0 996 781 granted to the present applicant, which evolved out of WO 99/04074 , in which a polyamide-containing yarn is used for fabricating artificial grass, wherein the yarn, besides polyamide, also contains a polyolefin compound selected from the group consisting of polypropylene, LLDPE and a block copolymer of polypropylene and polyethylene. In addition to the method of manufacturing a yarn that is known therefrom, wherein the polymer is extruded so as to form monofilaments, which are subsequently processed into bands, with several bands being twisted to form a yarn, a method is disclosed in which the yarn is obtained by means of a co-extrusion process. When such an extrusion process is used, the cladding consists of polyamide, whilst the core consists of one of the aforesaid plastics.
  • From International application WO 2004/106601 there is known a yarn for an artificial lawn in which the yarn is a so-called tape filament consisting of a core layer and two outer layers of a material different from that of the core layer, wherein the core layer contains polyester and/or polyolefin material and wherein the outer layers contain high-density polyethylene.
  • Japanese patent publication JP 2003 342848 discloses a yarn for an artificial lawn that consists of a conjugated yarn formed of a resin composition comprising 70-99 wt.% nylon (polyamide) and 1-30 wt.% polyethylene as the inner layer and polyethylene as the outer layer.
  • A well-known phenomenon with artificial grass, in particular if the artificial grass is used for playing soccer thereon, is the occurrence of burns when players make a sliding tackle. This problem does not occur with natural grass, which natural material has a high a water content and which feels soft upon contact, so that the friction with the skin will be high. This high friction is disadvantageous from the viewpoint of skin damage, but because of the fact that the natural grass will wear away slightly upon contact, burns do not occur upon contact with natural grass. In addition to that it can be noted that natural grass is soft and will grow again after having worn away, in which connection it can furthermore be noted that the relatively soft nature of natural grass also contributes to favourable resilient properties.
  • On the other hand, there is generally a controversy when selecting the materials to be used for artificial grass. The material used for the artificial grass is a soft material, for example, which has a large elastic range. Such a property makes for a good resilience, but also a high degree of friction, which latter aspect will lead to excessive adhesion of the skin to the artificial grass when a sliding tackle is made, and thus to inevitable damage to the skin, which is undesirable. Said materials are evaluated as unsatisfactory as regards the heat development that takes place when a sliding tackle is made, in spite of the fact that because of the high degree of friction the period of contact between the skin and the artificial grass remains limited. The material used for the artificial grass may also be a hard material having a small elastic range, which leads to unsatisfactory properties as regards resilience but also to less friction. The reduction as regards the degree of friction will lead to less skin damage. In addition to that, said hard materials are evaluated as satisfactory as regards the heat development during sliding tackles, because the period of contact is longer.
  • It is an object of the present invention to provide a special type of artificial grass which imitates the advantageous properties of natural grass, in particular as regards resilience and behaviour during sliding tackles, as much as possible.
  • Another object of the present invention is to provide an artificial grass which exhibits a high degree of durability and which can be composed of commercially available materials.
  • According to the present invention, the artificial grass as referred to in the introduction is characterized by the characterising portion of claim 1.
  • One or more of the above objects are achieved by using such a type of artificial grass. Because a soft material is used for the core, favourable properties as regards resilience can be obtained, without the aforesaid disadvantageous surface properties playing a part. Moreover, because the cladding is built up of a relatively hard material, use is advantageously made of the relatively favourable surface properties, viz. a low degree of skin damage as a result of the low adhesion to the skin. Moreover, the unfavourable properties as regards resilience are minimised by using a hard material for the cladding.
  • The terms "soft" and "hard" as used in the present description must be interpreted in relation to each other, in which connection it is in particular important that the material for the cladding is harder than the material that is used for the core. The soft material for the core will have an elasticity modulus (according to ASTM D638) of maximally 500 MPa, preferably maximally 300 MPa. The hard material for the cladding will have an elasticity modulus (according to ASTM D638) of minimally 500 MPa, preferably minimally 750 MPa.
  • In a special embodiment, the material for the cladding has preferably been selected from the group consisting of polyethylene compounds, polypropylene and fluor polymers or combinations thereof, wherein the polyethylene compounds have been selected from the group consisting of high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low-density polyethylene (LLDPE) and anhydride modified polyethylene compounds.
  • In a special embodiment of the present invention, the cladding of the artificial fibre is relatively thin, viz. the thickness of the cladding is such that its volume makes up 1-40%, preferably 1-20%, of the volume of the entire fibre. Such a small thickness for the cladding makes it possible to make advantageous use of the high specific heat properties of the core material, which will lead to a reduced occurrence of burns.
  • The artificial grass according to the present invention is further characterized in that the artificial grass fibre has been obtained by means of a co-extrusion process, wherein the material for the core and the material for the cladding are extruded simultaneously, with the cladding being in direct contact with the core.
  • According to a preferred embodiment of the present artificial grass, the material for the core is polyamide and the material for the cladding is an anhydride modified HDPE.
  • The present invention furthermore relates to an artificial lawn built up from an artificial grass as described above.
  • In a special embodiment, a mixture of, for example, polyamide, in particular polyamide 12, and a modified polyethylene can be used for the core.
  • To prevent delamination of the core and the cladding, a compatibility agent has been added to the material for the core and/or to the material for the cladding, or to both materials, which compatibility agent enhances the bond between the material for the core and the material for the cladding. The compatibility agent is a copolymer of ethylene and methyl acrylate, with the methyl acrylate content in particular amounting to less than 50%, preferably about 30%.

Claims (11)

  1. An artificial grass built up of fibres that consist of a core and a cladding, which core and which cladding are composed of a plastic material, characterized In that the material for the core consists of polyamide, wherein the material for the cladding has been selected from the group consisting of polyethylene compounds, polypropylene and fluoropolymers, or combinations thereof, wherein a copolymer of ethylene and methyl acrylate as a compatibility agent has been added to the material for the core and/or to the material for the cladding, or to both materials, which compatibility agent enhances the bond between the material for the core and the material for the cladding.
  2. An artificial grass according to claim 1, characterized in that the polyethylene compounds have been selected from the group consisting of high density polyethylene (HDPE), medium density polyethylene (MDPE), low density polyethylene (LDPE), linear low-density polyethylene (LLDPE) and anhydride modified polyethylene compounds.
  3. An artificial grass according to any one or more of the preceding claims, characterized in that the artificial glass fibre has been obtained by means of a co-extrusion process, wherein the material for the core and the material for the cladding are extruded simultaneously, with the cladding being In direct contact with the core.
  4. An artificial grass according to any one or more of the claims 1-3, characterized In that the material for the core is polyamide and the material for the cladding is an anhydride modified HDPE.
  5. An artificial grass according to any one or more of the preceding claims, characterized in that the material for the core has an elasticity modulus (measured in accordance with ASTM D638) of maximally 500 MPa.
  6. An artificial grass according to Claim 5, characterized in that the material for the core has an elasticity modulus (measured in accordance with ASTM D638) of maximally 300 MPa.
  7. An artificial grass according to any one or more of the preceding claims, characterized in that the material for the cladding has an elasticity modulus (measured in accordance with ASTM D638) of at least 500 MPa.
  8. An artificial grass according to claim 7, characterized in that the material for the cladding has an elasticity modulus (measured In accordance with ASTM D638) of at least 750 MPa.
  9. An artificial grass according to any one or more of the preceding claims, characterized In that the thickness of the cladding is such that its volume makes up 1-40% of the volume of the entire fibre.
  10. An artificial grass according to any one or more of the preceding claims, characterized in that in the compatibility agent the methyl acrylate content amounts to less then 50%.
  11. An artificial lawn built up of artificial grass according to any one or more of the preceding claims.
EP05825919A 2004-12-24 2005-12-22 Artificial grass built up of fibres that consist of a core and a cladding, as well as an artificial lawn built therefrom Not-in-force EP1828449B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL1027878A NL1027878C2 (en) 2004-12-24 2004-12-24 Artificial grass constructed from fibers consisting of a core and a mantle, as well as an artificial grass field built from it.
PCT/NL2005/000886 WO2006068476A1 (en) 2004-12-24 2005-12-22 Artificial grass built up of fibres that consist of a core and a cladding, as well as an artificial lawn built up therefrom

Publications (2)

Publication Number Publication Date
EP1828449A1 EP1828449A1 (en) 2007-09-05
EP1828449B1 true EP1828449B1 (en) 2013-02-13

Family

ID=34974694

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05825919A Not-in-force EP1828449B1 (en) 2004-12-24 2005-12-22 Artificial grass built up of fibres that consist of a core and a cladding, as well as an artificial lawn built therefrom

Country Status (5)

Country Link
US (1) US20080280075A1 (en)
EP (1) EP1828449B1 (en)
NL (1) NL1027878C2 (en)
NO (1) NO338840B1 (en)
WO (1) WO2006068476A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012024685A1 (en) * 2012-12-18 2014-06-18 Gerhard Schramm Artificial turf has a yarn comprising thermoplastic elastomer, where yarn has polyurethane, particularly thermoplastic polyurethane, where yarn has fiber with thirty percent to seventy percent polyethylene
US9005723B2 (en) 2010-11-09 2015-04-14 Tarkett Inc. Fiber for synthetic grass field

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60331603D1 (en) * 2003-05-28 2010-04-15 Lankhorst Pure Composites Bv Artificial turf yarn, this containing ground cover and playing field and method
DE502007002924D1 (en) 2007-04-19 2010-04-08 Motech Gmbh Technology & Syste artificial grass
EP1983103B1 (en) * 2007-04-19 2014-02-19 Reifenhäuser GmbH & Co. KG Maschinenfabrik Synthetic turf
NL1033949C2 (en) * 2007-06-07 2008-12-09 Desseaux H Tapijtfab Artificial grass constructed from fibers consisting of a core and a mantle, as well as an artificial grass field built from it.
US9011740B2 (en) 2008-12-15 2015-04-21 Textile Management Associates, Inc. Method of recycling synthetic turf and infill product
US20150204027A1 (en) * 2014-01-22 2015-07-23 Dow Global Technologies Llc Artificial turf filaments, and articles made therefrom
CN105377391B (en) * 2014-03-27 2020-06-02 普利特运动产品有限责任公司 Artificial turf and method of production
EP3480361A1 (en) * 2017-11-03 2019-05-08 Polytex Sportbeläge Produktions-GmbH Artificial turf fiber with a non-circular cladding
EP3480344A1 (en) * 2017-11-03 2019-05-08 Polytex Sportbeläge Produktions-GmbH Production of an artificial turf fiber with a non-circular cladding
CN111395102B (en) * 2020-02-24 2022-06-10 广州傲胜人造草股份有限公司 Hydrophobic sports artificial turf

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US4230752A (en) * 1979-04-26 1980-10-28 Brunswick Corporation Cigarette burn proof artificial grass
JPS60231815A (en) * 1984-04-28 1985-11-18 Kureha Chem Ind Co Ltd Vinylidene fluoride resin monofilament and its manufacture
NL8602312A (en) * 1986-09-12 1988-04-05 Nijverdal Ten Cate Textiel METHOD FOR MANUFACTURING AN ARTIFICIAL GRASSMAT AND ARTIFICIAL GRASSMAT OBTAINED THEREFROM
PT776762E (en) * 1995-12-01 2001-01-31 Lankhorst Indutech Bv CO-EXTRUDED TAPE OR WIRE
NL1006606C2 (en) * 1997-07-17 1999-01-19 Desseaux H Tapijtfab Yarn for artificial grass, method of manufacturing the yarn and artificial grass field in which said yarn is incorporated.
US20020091011A1 (en) * 2000-11-29 2002-07-11 Sosin Howard B. Impact and roll measurement device
KR100965268B1 (en) * 2001-07-19 2010-06-22 랑크호르스트 푸레 콤파지테스 베.파우. Polyolefin film, tape or yarn
JP2003342848A (en) * 2002-05-23 2003-12-03 Hagihara Industries Inc Pile yarn for artificial turf intended for multi-purpose ground
EP1378592A1 (en) * 2002-07-01 2004-01-07 Ten Cate Thiolon B.V. Artificial fibre as well as an artificial lawn for sports fields provided with such fibre
DE60331603D1 (en) * 2003-05-28 2010-04-15 Lankhorst Pure Composites Bv Artificial turf yarn, this containing ground cover and playing field and method
WO2006047374A1 (en) * 2004-10-22 2006-05-04 Dow Global Technologies Inc. Improved microlayer structures and methods
GB0427829D0 (en) * 2004-12-20 2005-01-19 Solvay Polyethylene composition for artificial turf
EP1803841B1 (en) * 2005-12-30 2008-10-15 Mondo S.p.A. A method for producing a yarn for synthetic grass, and synthetic grass structure produced using such a yarn
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DE602006013124D1 (en) * 2006-08-18 2010-05-06 Mondo Spa Artificial turf yarn, nozzle and process for its production, use and artificial turf containing this yarn
PT2011919E (en) * 2007-07-06 2014-07-16 Mondo Spa Flooring material and methods of manufacture

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9005723B2 (en) 2010-11-09 2015-04-14 Tarkett Inc. Fiber for synthetic grass field
US9873989B2 (en) 2010-11-09 2018-01-23 Tarkett Inc. Fiber for synthetic grass field
DE102012024685A1 (en) * 2012-12-18 2014-06-18 Gerhard Schramm Artificial turf has a yarn comprising thermoplastic elastomer, where yarn has polyurethane, particularly thermoplastic polyurethane, where yarn has fiber with thirty percent to seventy percent polyethylene

Also Published As

Publication number Publication date
US20080280075A1 (en) 2008-11-13
WO2006068476A8 (en) 2017-01-19
NL1027878C2 (en) 2006-06-27
NO20073597L (en) 2007-09-20
EP1828449A1 (en) 2007-09-05
WO2006068476A1 (en) 2006-06-29
NO338840B1 (en) 2016-10-24

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