EP2004885A2 - Pelouse synthetique ressemblant a un champ d'herbe - Google Patents

Pelouse synthetique ressemblant a un champ d'herbe

Info

Publication number
EP2004885A2
EP2004885A2 EP07723340A EP07723340A EP2004885A2 EP 2004885 A2 EP2004885 A2 EP 2004885A2 EP 07723340 A EP07723340 A EP 07723340A EP 07723340 A EP07723340 A EP 07723340A EP 2004885 A2 EP2004885 A2 EP 2004885A2
Authority
EP
European Patent Office
Prior art keywords
yarn
yarns
synthetic turf
tufts
fibrillated
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.)
Withdrawn
Application number
EP07723340A
Other languages
German (de)
English (en)
Inventor
Jan De Clerck
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.)
DOMO Zele NV
Original Assignee
DOMO Zele 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 DOMO Zele NV filed Critical DOMO Zele NV
Priority to EP07723340A priority Critical patent/EP2004885A2/fr
Publication of EP2004885A2 publication Critical patent/EP2004885A2/fr
Withdrawn legal-status Critical Current

Links

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
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
    • 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
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/44—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds
    • D01F6/46—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds as major constituent with other polymers or low-molecular-weight compounds of polyolefins

Definitions

  • the present invention relates to artificial grass fields and more specific to a synthetic turf having yarns with a specific chemical composition.
  • the invention further relates to the cross-section profile and/or color of yarns comprised by a synthetic turf.
  • Synthetic or artificial turf is used more and more to replace natural grass turf on playing surfaces, in particular on sport fields like fields for playing football, rugby, tennis, golf, hockey, baseball, etc.
  • a top-dressing can be applied onto the backing layer. The thickness of this top-dressing is smaller than the height of the tufts so that the grass-like filaments project above the top-dressing.
  • a top- dressed synthetic turf is disclosed for example in US-A-4 337 283 and WO 2004/077914.
  • the top-dressing of so-called third generation synthetic grass fields usually consists of a hard layer and on top a layer of resilient granules, as for instance disclosed in WO 01/98589.
  • This document discloses a synthetic grass assembly for installation on a supporting substrate comprising a pile fabric with a flexible sheet backing and a plurality of upstanding synthetic ribbons of a selected length.
  • An infill layer of particulate material selected from the group consisting of hard and resilient granules, is disposed interstitially between the upstanding ribbons upon the upper surface of the backing with a depth less than the length of the ribbons.
  • the infill layer in particular comprises a bottom course of hard granules, disposed upon the top surface of the backing and a top course substantially exclusively of resilient granules disposed upon the bottom course.
  • resilient granular materials that may be used as infill materials may include mixtures of granulated rubber particles like SBR (styrene butadiene rubber) recycled from car tires, EPDM (ethylene-propylene-diene monomer), other vulcanised rubbers or rubber recycled from belts.
  • SBR styrene butadiene rubber
  • EPDM ethylene-propylene-diene monomer
  • these rubbers have several important disadvantages. In particular, they can not be re-used and have a limited life span since they loose there properties throughout use. Furthermore, the use of this type of rubbers in a top-dressing layer of a synthetic turf does not provide sufficient resilience or shock absorption. Most of the synthetic turf for football fields consists nowadays of pile fabric made of fibrillated yarn.
  • a drawback of the used fibrillated yarns is that they have a relatively low wear resistance and that a post-fibrillation with a rigid (steel) brush is required after having laid the synthetic turf.
  • the post-fibrillation is required to separate the different filaments of the fibrillated yarn from one another in order to hide the top-dressing better from view and in order to achieve the look of natural grass.
  • a drawback of such a post-fibrillation however is that the pile yarn is damaged.
  • synthetic turf made of fibrillated yarn there is also synthetic turf made of so-called monotape or monofilament yarn.
  • monotape and monofilament yarn are so-called monotape and monofilament yarn.
  • a drawback of synthetic turf made of monotape or monofilaments is that the top-dressing is less stabilised against shifting and/or erosion and that the rubber granules are less hampered from jumping up.
  • most of the monotape or monofilament yarns used to make artificial turf consist of polypropylene, which offers better resilience properties than polyethylene, but which has a higher coefficient of friction so that burning wounds occur much quicker, for example when falling or making a sliding on the synthetic turf surface.
  • Synthetic turfs formed by yarns made of polyamide have been reported in the art, and are for instance disclosed in US 3,940,522 and WO 99/04074.
  • synthetic turfs are described comprising grass-like synthetic fibers and crimped fibers.
  • One or more of the grass-like fibers are combined with an appropriate multi-fiber strand of crimped and/or latently crimpable fibers.
  • the fibers are made of polyamides such as nylon 6, nylon 6,6, nylon 6,10, nylon 6,12, and copolymers and blends of these.
  • WO 99/04074 discloses yarns containing polyamide in combination with a polyolefin compound for producing artificial grass.
  • a major disadvantage of synthetic turfs formed by yarns made of polyamide is that the turfs show high sliding resistance and a high coefficient of friction, so burning wounds occur much quicker, for example when falling or making a sliding on the synthetic turf surface.
  • WO 2004/077914 provides a synthetic turf overcoming some of these problems.
  • the turf is made by combining fibrillated and monofilament yarns into the tufts.
  • a tuft is made of a composite yarn, which is composed of a fibrillated yarn twined around several monofilament yarns, thereby avoiding differences in wear patterns to become visible.
  • the turf immediately resembles better natural grass, so no post-fibrillation is needed.
  • yarns made of polyethylene the synthetic turf is rendered more sliding-friendly, due to the lower coefficient of friction of polyethylene than that of polypropylene.
  • a disadvantage however is that by gaining sliding-friendliness the turf also loses in resilience.
  • the present invention aims to provide this turf with a better resemblance to natural grass and to prevent the artificial look of synthetic turfs presently known in the prior art.
  • the present invention relates to a synthetic turf, according to claim 1 , whereby at least a number of the yarns making up the tufts (2) consist essentially of a mixture of high density polyethylene (HDPE) and low density linear polyethylene (LLDPE).
  • This mixture comprises between 20 to 80% HDPE and 80 to 20% LLDPE, preferably 40 to 60% HDPE and 60 to 40% LLDPE and even more preferably is the amount of HDPE approximately the same as that of LLDPE.
  • the effect obtained by using a combination of both raw materials is that the yarns combine the stiffness, resilience, UV-stability and wear resistance of HDPE with the softness and sliding-friendliness of LLDPE.
  • the tufts (2) of the turf are made of a composite yarn, twining fibrillated (6) and filament (7) yarns of HDPE and LLDPE together.
  • the more homogeneously mixing of both yam types results in an improved resemblance to natural grass, without the need for post-fibrillation or subjecting to wear for some time, and prevents that a difference in wear pattern can be seen without a close inspection of the tufts.
  • the fibrillated yarn (6) is twined around the individual filament yarns (7) so that the composite yarn has an outer surface which is mainly formed by the fibrillated yarn (6). Composed in this way the composite yarns are fed to the tufting machine more easily and with a higher efficiency.
  • the yarn number of the composite yarn is chosen between 5000 and 30000 dtex, preferably between 9000 and 20000 dtex and more preferably about 16000 dtex. This is done by carefully selecting the yarn numbers of the fibrillated (6) and filament (7) yarns, making up said composite yarn. For this purpose also the number of different yarns making up the composite yarn is chosen carefully. According to the present invention, the best results are achieved by twining 1 to 3 fibrillated yarns (6), and preferably 1 , together with 3 to 9 individual filament yarns (7), and preferably 6.
  • Fibrillated yarns (6) are comprised in the tufts (2) because, compared to individual filament yarns (7), they are more resilient and provide a better stabilization of the top-dressing of the finished turf.
  • the fibrillated yarn (6) is produced by making longitudinal slits in a tape, preferably of LLDPE, thereby forming laterally interconnected filaments. The slits are made in such that the yarns achieve the natural look of grass immediately after tufting.
  • the present invention also relates to an individual filament yarn (7), according to claim 9, comprising a convex or curved cross-section.
  • the cross-section of the yarn can further have rounded edges and/or an S or slightly curved profile.
  • the yarn can also exhibit point symmetry.
  • These enclosed features result in an improved resilience of the individual filament yarn (7) and provide the turf made out of such yarns with a more natural look.
  • the present invention also relates to a synthetic turf comprising tufts (2) made of a composite yarn, composed of at least one fibrillated yarn (6) twined together with individual filament yarns (7) having the previously discussed features or any combination thereof.
  • These composite yarns can also comprise individual filament yarns (7) with a flat profile.
  • a turf comprising composite yarns composed in this way has the benefit of being more resilient and looking more like natural grass. Furthermore, by making a number of these yarns, and preferably all of them, in the mixture of HDPE and LLDPE, as described in claim 1 , the turf will also exhibit the stiffness, resilience, UV- stability and wear resistance of HDPE and the softness and sliding-friendliness of LLDPE.
  • the synthetic turf of the present invention is given a more natural look to resemble grass by using yarns in at least two different colors and preferably in three or more different colors, such as yellow-green, bright green and dark green, to compose the tufts (2). This way the artificial appearance of uni-colored turfs is prevented.
  • Fig.1 is a schematic picture comparing the resilience (A), the temperature stability
  • Fig. 2 demonstrates the composition of a tuft (2), originated from a composite yarn, consisting of one fibrillated yarn (6) twined around six individual filament yarns (7).
  • Fig. 3 is a cross-sectional view, according to A-A of Fig. 2, of a possible embodiment of an individual filament yarn (7) having a propeller profile.
  • Fig. 4 is a cross-sectional view, according to A-A of Fig. 2, of a possible embodiment of an individual filament yarn (7) having a biconvex profile.
  • Fig. 5 is a cross-sectional view, according to A-A of Fig. 2, of a possible embodiment of an individual filament yarn (7) having a S-like profile.
  • Fig. 6 is a cross-sectional view, according to A-A of Fig. 2, of a possible embodiment of an individual filament yarn (7) having a waving profile.
  • Fig. 7 is a cross-sectional view through a finished synthetic grass field, comprising a tuftcloth (1 ) and tufts (2) made from a composite yarn and the turf filled further with a two layered top-dressing (4 and 5).
  • the synthetic turf illustrated in Fig. 7 comprises a flexible tuftcloth (1 ) provided with rows of tufts (2) made of a composite or combined yarn.
  • the tufts (2) shown in this figure are actually cross-sections displaying only one half of the tufts in the synthetic turf of the invention, whereas the front view of the tuft (2) in Fig. 2 displays both halfs but shows only the upper part of the tuft (2).
  • Such a turf may be defined by 5000 to 10000 tufts (2) per m 2 of tuftcloth (1 ), preferably between 6124 and 8250, and more preferably 6929 tufts/m 2 .
  • the synthetic turf is filled with a top-dressing, for example comprising a layer of sand (4) and a layer of rubber granules (5).
  • the thickness of this top- dressing is smaller than the height of the tufts so that the tufts project above the top- dressing.
  • the thickness of this top-dressing comprises between 0.5 and 5.0 cm and more preferably between 2.0 and 3.0 cm.
  • the weight of the top-dressing is between 5000 and 40000 g/m 2 , preferably of between 21000 and 32000 g/r ⁇ 2
  • the layer of sand (4) allows a good water permeability and ensures stability, whereas the rubber infill (5) is spread on top of the sand to prevent burnings and to obtain an excellent shock absorption.
  • the synthetic turf comprising a tuftcloth (1 ) and tufts (2), is produced by feeding the composite or combined yarn through the needles of a tufting machine and inserting them through the tuftcloth (1 ).
  • the tufts (2) are made up by both ends of the composite or combined yarn projecting from the tuftcloth (1) and are secured by stitching said yarn to the tuftcloth (1 ).
  • the height of the tufts (2) is between 1.5 to 30 cm, preferably of between 3 and 15 cm and more preferably of between 5 to 8 cm.
  • the tuftcloth (1) may consist for example of a woven HO6 sheet and a glass fibre netting fixed to each other by means of an adhesive material, such as latex or foam. Since the tuftcloth (1) is no essential feature of the present invention, no further details will be described thereof.
  • the tufts (2) of the synthetic turf have preferably an average height larger than 30 mm and more preferably an average height larger than 40 mm. In this way, the tufts (2) of the pile layer still project over a sufficient distance above the top-dressing.
  • the average height of the tufts (2) is usually smaller than 75 mm and is preferably comprised between 50 and 60 mm.
  • the average height of the tufts (2) is to be determined by measuring and totalling the height of the different filaments and dividing the achieved number by the number of filaments.
  • Fig. 7 a schematic cross-sectional view of some tufts (2) according to the present invention is displayed.
  • Fig. 2 provides a front view of the upper part of a preferred embodiment of a tuft (2).
  • the tufts (2) comprise individual filament yarns (7) and at least one fibrillated yarn (6). Combining these two yarn types prevents differences in wear pattern, illustrated in Fig. 1 C, to become visible without the need for a close examination of the tufts.
  • at least a number of these yarns consist essentially of a mixture of high density polyethylene (HDPE) and linear low density polyethylene (LLDPE).
  • HDPE high density polyethylene
  • LLDPE linear low density polyethylene
  • the composition of this mixture comprises 20 to 80% HDPE and 80 to 20% LLDPE, preferably 40 to 60% HDPE and 60 to 40% LLDPE, and more preferably about 50% HDPE and about 50% LLDPE.
  • LLDPE has the advantage that it is resistant to very low temperatures, has a small coefficient of friction, thereby rendering the turf soft and sliding- friendly, and has a higher wear resistance than for example polypropylene.
  • HDPE on the contrary, is more rigid and has a higher resilience, a better UV-stability and an even better wear resistance.
  • a turf made up of yarns comprising a mixture of these both raw materials, displays a better resilience, UV-stability and wear resistance and combines the stiffness of HDPE with the softness, and resulting sliding-friendliness, of LLDPE.
  • the polyethylene contains certain additives such as UV and heat stabilisers, colour pigments and/or colorants.
  • it may even contain small amounts of one or more other polymers, more particularly in an amount of less than 10 % by weight, preferably less than 5 % by weight.
  • Fig. 1 illustrates the comparison of three features, i.e. resilience (A), temperature stability (B) and wear resistance (C), of individual filament yarns (7), fibrillated yarns (6) and the tufts made of the composite yarn.
  • the fibrillated yarns (6) are the most resilient yarns and contribute the most to the high resilience of the tufts (2).
  • Fig. 1 B displays the temperature stability of the yarns (6, 7) and tuft (2).
  • the wear resistance of the different yarns is demonstrated in Fig. 1C.
  • the individual filament yarns (7) are much more resistant than fibrillated yarns (6) and the same wear pattern is found in the yarns of the composite yarn. However, because of the more homogeneous mixing of the yarns (6, 7) in the composite yarn, the difference in wear pattern between the fibrillated (6) and the individual filament (7) yarns isn't visible without close examination of the turf.
  • the tufts (2) are derived from composite yarns, formed of fibrillated (6) and filament (7) yarns of the previously described mixture of HDPE and LLDPE.
  • the individual filament yarns (7) and the fibrillated yarn (6) are twined together.
  • the word "twined” here has to be understood in its broadest meaning and includes for example also a simple twisting of the yarns.
  • the composite yarn may further be twined into the S or Z direction. The number of windings (per meter) during the twining process must be limited in such a manner that the filaments will spread themselves again after the tufting process. This can be determined experimentally.
  • the fibrillated yarn (6) is preferably twined around the individual filament yarns (7) so that the composite yarn has an outer surface which is mainly formed by the fibrillated yarn (6).
  • Twining the yarns in such a way has the advantage that the composite yarn can be fed to the tufting machine and tufted more easily and efficiently.
  • the number and yarn number of the fibrillated (6) and individual filament (7) yarns can be easily selected in such a manner that, without post-fibrillation, the turf immediately resembles grass.
  • the composite yarn will usually comprise 3 to 9, and preferably 6 individual filament yarns (7). It may comprise up to three fibrillated yarns (6) but preference is given to the presence of only one. In this case, i.e. when only one fibrillated yarn (6) is present, it may have a larger yarn number so that the filaments are better connected with one another.
  • the yarn number of the composite yarn is indeed preferably formed for at least 40%, more preferably for at least 50%, by the individual filament yarns (7) in order to resemble immediately as much as possible natural grass.
  • preferably at least 30%, and more preferably at least 35% of the yarn number of the composite yarn is formed by the fibrillated yarn or yarns (6).
  • the yarn number of the composite yarn will usually be between 5000 and 30000 dtex, preferably between 9000 and 20000 dtex and even more preferably about 16000 dtex.
  • the distances between the rows of tufts may be larger.
  • the mutual distances between the rows will be comprised between 8 and 24 mm, preferably between 10 and 20 mm, and more preferably between 12 and 18 mm. A mutual distance of 16 mm or larger is most preferred.
  • a fibrillated yarn (6) is produced starting from an extruded film which is first cut into bands.
  • longitudinal slits are made so that laterally interconnected filaments are formed.
  • These slits can be made for example by means of a drum provided with needles (and rotated at a speed different from the speed of the film led over this drum) or teeth as disclosed in US-A-3 496 259.
  • the fibrillated yarn (6) has for example a total width of 9 mm, the slits being arranged so that the interconnected filaments have a width which is preferably somewhat smaller than the width of the individual filament yarns.
  • the slits are preferably not provided on the same mutual distances so that broader filaments are separated by narrower filaments which provide for a looser connection between the broader filaments.
  • the yarn number of the fibrillated yarn (6) will normally be comprised between 2000 and 1 1000 dtex, preferably between 5000 and 8500 dtex, and more preferably 6800 dtex.
  • the composite yarn may contain more individual filament yarns (7) since the maximum yarn number of the composite yarn is limited by the tufting technique.
  • the composite yarn can for example be made with three fibrillated yarns (6), having each a yarn number of 2000 dtex. These fibrillated yarns (6) can first be twined together and can subsequently, in a second twining operation, be twined together with the individual filament yarns (7).
  • the thickness of the fibrillated yarn (6) is preferably comprised between 60 and 100 ⁇ m, and more preferably between 70 and 90 ⁇ m. Since the filaments of the fibrillated yarn (6) are interconnected, the thickness thereof may be smaller than the thickness of the individual filament yarns (7). A predetermined minimum thickness is however preferred because of the higher wear resistance (mechanical wear and/or heat and UV degradation) and the increased resiliency obtained by a larger thickness.
  • the individual filament yarns (7) are produced in such a way that they resemble grass. Therefore, the yarn number will usually be comprised between 1000 and 3000 dtex, and preferably between 1100 and 1700 dtex.
  • the composite yarn may combine for example two individual filament yarns (7) of 1500 dtex and four such yarns (7) of 1550 dtex.
  • the width of the yarns (7) is preferably smaller than 7 mm, more preferably smaller than 4 mm, and most preferably smaller than 2 mm, but larger than 0.8 mm, and preferably larger than 1 mm.
  • a fine, natural grass look is for example obtained when the width of the filament yarns (7) comprises about 1.4 mm.
  • the thickness of the individual filament yarns (7) is not only important to achieve the look of natural grass, but also to achieve the required resilience properties.
  • the individual filament yarns (7) will usually have a thickness of between 100 and 400 ⁇ m. Good results have for example been obtained when the thickness of the individual filament yarns (7) comprises about 160 ⁇ m.
  • the shape of the yarn can make a contribution to its resilience. The best results were achieved by using individual filament yarns (7) having a convex or curved cross-section.
  • the cross-section of the yarn could further be provided with rounded edges and/or an S or slightly curved profile.
  • the yarns obtaining the best results also exhibit point symmetry.
  • Four different embodiments, meeting one or more of these requirements are illustrated in Figs. 3 to 6 and demonstrate four different cross- sectional profiles responsible for the much better resilience of the individual filament yarn (7). As is clear to a person skilled in the art, these embodiments are only exemplifying and aren't limitative to the scope of the invention.
  • the yarn (7) has a cross-section of a propeller profile, displaying a node and two arms.
  • the node in the centre of the yarn (7), comprises the thickness previously described.
  • the arms starting from the node and separated from each other over 180°, have, at the node, a thickness of 50 to 100 ⁇ m, which gradually decreases towards the ends of the arms to a thickness in between 1 and 50 ⁇ m.
  • the propeller shape of the yarn is characterized in that the ends of the arms are curved in opposite direction over a distance of between 20 and 200 ⁇ m and over an angle of between 20° and 70°, and preferably over an angle of 45°.
  • the second embodiment illustrated in Fig. 4, describes an individual filament yarn (7) with a cross-section of a biconvex profile.
  • the centre of the yarn displays the same thickness as previously described, and this thickness gradually decreases in a convex way towards the sides of the yarn, preferably to a point.
  • an individual filament yarn (7) is described with a cross-section of a S-like profile.
  • the thickness in the centre of the yarn is the same as previously described, but decreases gradually in a convex manner until a thickness of between 1 and 50 ⁇ m.
  • the ends of the yarn are curved in opposite direction over a distance of between 20 and 200 ⁇ m and over an angle of between 20° and 70°, and preferably over an angle of 45°.
  • a fourth embodiment, illustrated in Fig. 6, relates to a yarn (7) displaying the cross-section of a waving profile.
  • the yarn has a thickness as mentioned before, which remains substantially the same over its entire width, and comprises two curves bent in opposite direction. The ends of the yarn are rounded.
  • the present invention also relates to a synthetic turf comprising tufts (2) made of a composite yarn, composed of at least one fibrillated yarn (6) twined together with individual filament yarns (7), having a convex, curved, S, slightly curved profile, rounded edges and/or point symmetry, or any combination thereof,.
  • These composite yarns, with at least one fibrillated yarn and one of said individual filament yarns (7) can also comprise individual filament yarns (7) with a flat profile.
  • a turf comprising composite yarns composed in this way has the benefit of being more resilient and looking more like natural grass. Furthermore, by making a number of these yarns, and preferably all of them, in the mixture of HDPE and LLDPE, as described before, the turf will also exhibit the stiffness, resilience, UV-stability and wear resistance of HDPE and the softness and sliding- friendliness of LLDPE.
  • the synthetic turf of the present invention is given a more natural look to resemble grass by using yarns in at least two different colors and preferably in three or more different colors, such as yellow-green, bright green and dark green, to compose the tufts (2). This way the artificial appearance of uni-colored turfs is prevented.
  • a composite yarn was made by twining one fibrillated yarn (6) around six individual monofilament yarns (7).
  • the composite yarn had a yarn number of 16000 dtex and was composed of one fibrillated yarn (6) having a yarn number of 6800 dtex, four individual monofilament yarns (7), having a propeller profile and a yarn number of 1550 dtex, and two flat shaped yarns of 1500 dtex.
  • the individual monofilament yarns (7) were all made of a mixture of 50% HDPE and 50% LLDPE, containing UV and heat stabilizers. To some of the yarns a yellow-green pigment was added, to others a bright green pigment and to the remaining yarns a dark green pigment.
  • a tuft (2) was made by combining the different colored yarns in such a way that the resulting turf had a more natural look of grass.
  • the composite yarn was tufted on a tuftcloth (1) consisting of a woven HO6 layer and a glass fiber netting.
  • the needle distance of the tufting machine was set at 5/8" and an average of 6929 tufts (2) was placed every m 2 of the tuftcloth (1 ).
  • the tufts (2) had an average height (h) of 50 mm and an average weight of 1330 g/m 2 .
  • Fixation of the tufts (2) to the tuftcloth (1) was achieved by stitching, in particular 11 stitches per 10 cm.
  • the resulting synthetic grass is illustrated in Fig. 7.
  • each tuft (2) shows only one portion of the composite yarn.
  • each tuft (2) comprises, due to the tufting technique, two portions of the composite yarn, the filaments of both portions being intermixed with one another.
  • a top-dressing comprising a layer of sand (4) and subsequently a layer of rubber granules (5).
  • the resulting weight of the entire composition was 2624 g/m 2 .
  • the synthetic turf immediately resembled natural grass, i.e. no post-fibrillation or wear was necessary to achieve this look.
  • a composite yarn was made by twining one fibrillated yarn (6) around six individual monofilament yarns (7).
  • the composite yarn had a yarn number of 16000 dtex and was composed of one fibrillated yarn (6) having a yarn number of 6800 dtex, four individual propeller shaped monofilament yarns with a yarn number of 1550 dtex and two flat shaped yarns of 1500 dtex.
  • the individual monofilament yarns were all made of a mixture of 50% HDPE and 50% LLDPE, containing UV and heat stabilizers. To some of the yarns a yellow-green pigment was added, to others a bright green pigment and to the remaining yarns a dark green pigment.
  • a tuft (2) was made by combining the different colored yarns in such a way that the resulting turf had a more natural look of grass.
  • the composite yarn was tufted on a tuftcloth (1 ) consisting of a woven HO6 layer and a glass fiber netting.
  • the needle distance of the tufting machine was set at 5/8" and an average of 6929 tufts (2) was placed every m 2 of the tuftcloth (1).
  • the tufts (2) had an average height (h) of 60 mm and an average weight of 1575 g/m 2 .
  • Fixation of the tufts (2) to the tuftcloth (1 ) was achieved by stitching, in particular 11 stitches per 10 cm.
  • the resulting synthetic grass is illustrated in Fig. 7.
  • each tuft (2) shows only one portion of the composite yarn.
  • each tuft (2) comprises, due to the tufting technique, two portions of the composite yarn, the filaments of both portions being intermixed with one another.
  • the resulting weight of the entire composition was 2869 g/m 2 .
  • the synthetic turf immediately resembled natural grass, i.e. no post- fibrillation or wear was necessary to achieve this look.
  • a composite yarn was made by twining eight individual monofilament yarns (7) together.
  • the composite yarn had a yarn number of 12200 dtex and was composed of four individual waving shaped monofilament yarns with a yarn number of 1550 dtex and four flat shaped yarns of 1500 dtex.
  • the yarns with the cross-section of a waving profile have a total width of L 1 , being 6.38 cm. Over a width L 2 of 6 cm, the thickness d remains 0.38 cm while the rounded ends have a radius R 3 of 0.19 cm.
  • the outer diameter R 1 and inner diameter R 2 of the curves comprise respectively 6.38 and 6 cm.
  • the individual monofilament yarns (7) were all made of a mixture of 50% HDPE and 50% LLDPE, containing UV and heat stabilizers. To some of the yarns a yellow-green pigment was added, to others a bright green pigment and to the remaining yarns a dark green pigment.
  • a tuft (2) was made by combining the different colored yarns in such a way that the resulting turf had a more natural look of grass.
  • the composite yarn was tufted on a tuftcloth (1 ) consisting of a woven HO6 layer and a glass fiber netting. The needle distance of the tufting machine was set at 5/8" and an average of 6929 tufts (2) was placed every m 2 of the tuftcloth (1 ).
  • each tuft (2) shows only one portion of the composite yarn.
  • each tuft (2) comprises, due to the tufting technique, two portions of the composite yarn, the filaments of both portions being intermixed with one another.
  • the resulting weight of the entire composition was 2869 g/m 2 .
  • the synthetic turf immediately resembled natural grass, i.e. no post- fibrillation or wear was necessary to achieve this look.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)
  • Carpets (AREA)
  • Artificial Filaments (AREA)

Abstract

La présente invention concerne un nouveau type de pelouse synthétique ressemblant à un champ d'herbe. La pelouse synthétique comprend une étoffe et des touffes se projetant à partir de cette étoffe, au moins un certain nombre des fils constituant les touffes consistant sensiblement en un mélange de polyéthylène de haute densité et de polyéthylène linéaire de faible densité, conférant à la touffe une résilience améliorée et un meilleur caractère glissant. L'invention concerne également des fils présentant différents profils de section transversale, résultant en une meilleure résilience. La pelouse synthétique comprenant ces fils présente une résilience bien meilleure, ainsi qu'un aspect plus naturel. Afin d'améliorer encore l'aspect naturel de la pelouse synthétique et pour éviter une apparence artificielle, la présente invention concerne également l'utilisation d'au moins deux couleurs différentes et de préférence trois couleurs différentes ou plus pour les fils, telles que jaune-vert, vert clair et vert foncé.
EP07723340A 2006-03-21 2007-03-16 Pelouse synthetique ressemblant a un champ d'herbe Withdrawn EP2004885A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP07723340A EP2004885A2 (fr) 2006-03-21 2007-03-16 Pelouse synthetique ressemblant a un champ d'herbe

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP06447040A EP1837423A1 (fr) 2006-03-21 2006-03-21 Gazon synthétique ressemblant à un gazon naturel
PCT/EP2007/002362 WO2007107307A2 (fr) 2006-03-21 2007-03-16 Pelouse synthetique ressemblant a un champ d'herbe
EP07723340A EP2004885A2 (fr) 2006-03-21 2007-03-16 Pelouse synthetique ressemblant a un champ d'herbe

Publications (1)

Publication Number Publication Date
EP2004885A2 true EP2004885A2 (fr) 2008-12-24

Family

ID=37441966

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06447040A Withdrawn EP1837423A1 (fr) 2006-03-21 2006-03-21 Gazon synthétique ressemblant à un gazon naturel
EP07723340A Withdrawn EP2004885A2 (fr) 2006-03-21 2007-03-16 Pelouse synthetique ressemblant a un champ d'herbe

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06447040A Withdrawn EP1837423A1 (fr) 2006-03-21 2006-03-21 Gazon synthétique ressemblant à un gazon naturel

Country Status (2)

Country Link
EP (2) EP1837423A1 (fr)
WO (1) WO2007107307A2 (fr)

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US11268248B2 (en) 2014-05-14 2022-03-08 Columbia Insurance Company Artificial turf and associated devices and methods for making same

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NL1035682C2 (nl) 2008-07-10 2010-01-12 Desseaux H Tapijtfab Kunstgrasveld.
EP2427600B1 (fr) 2009-05-06 2020-01-08 Saltex OY Fil de poil pour pelouse artificielle, pelouse artificielle contenant un tel fil, et méthode de production d'un tel fil
ES2442270T3 (es) * 2009-07-14 2014-02-10 Green Vision Co. Ltd. Hebra de hierba
AU2011101368B4 (en) * 2009-08-13 2012-06-14 Apt Asia Pacific Pty Ltd Artificial grass
ES2336760B1 (es) 2009-09-03 2011-03-15 Mondo Tufting S.A. Fibra para cesped artificial.
EP2374917B1 (fr) 2010-04-07 2013-02-13 Dow Global Technologies LLC Fil de gazon artificiel
ES2757926T3 (es) 2010-09-23 2020-04-30 Total Res & Technology Feluy Césped artificial
US9005723B2 (en) 2010-11-09 2015-04-14 Tarkett Inc. Fiber for synthetic grass field
EP2940212A1 (fr) 2014-05-02 2015-11-04 Polytex Sportbeläge Produktions-GmbH Production de gazon artificiel à l'aide d'un agent de nucléation
EP3741886A1 (fr) * 2016-10-31 2020-11-25 Polytex Sportbeläge Produktions-GmbH Fibre de gazon artificiel à partir d'une biomasse renouvelable
NL2017901B1 (en) * 2016-11-30 2018-06-11 Ten Cate Thiolon Bv Split Resistant Fibre
CN107190617A (zh) 2017-06-30 2017-09-22 青岛青禾人造草坪股份有限公司 仿天然草的人造草坪
CN109778637B (zh) * 2018-12-26 2022-06-17 广州傲胜人造草股份有限公司 一种抗静电人造草坪及其制备方法
USD962817S1 (en) 2019-12-20 2022-09-06 Go Green Synthetic Lawn Solutions, Llc Turf fiber
USD945310S1 (en) 2019-12-20 2022-03-08 Go Green Synthetic Lawn Solutions, Llc Turf fiber

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JP3342661B2 (ja) * 1998-03-23 2002-11-11 ダイヤテックス株式会社 人工芝生
EP1457600A1 (fr) * 2003-03-05 2004-09-15 Domo Cabrita Gazon synthétique
AU2003250972A1 (en) * 2003-07-14 2005-01-28 Mattex Leisure Industries Artificial turf filament and artificial turf system

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11268248B2 (en) 2014-05-14 2022-03-08 Columbia Insurance Company Artificial turf and associated devices and methods for making same

Also Published As

Publication number Publication date
EP1837423A1 (fr) 2007-09-26
WO2007107307A3 (fr) 2007-11-01
WO2007107307A2 (fr) 2007-09-27

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