WO2021053041A1 - Gazon artificiel retenant l'eau - Google Patents

Gazon artificiel retenant l'eau Download PDF

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Publication number
WO2021053041A1
WO2021053041A1 PCT/EP2020/075912 EP2020075912W WO2021053041A1 WO 2021053041 A1 WO2021053041 A1 WO 2021053041A1 EP 2020075912 W EP2020075912 W EP 2020075912W WO 2021053041 A1 WO2021053041 A1 WO 2021053041A1
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WO
WIPO (PCT)
Prior art keywords
blend
artificial turf
synthetic
total weight
polyethylene
Prior art date
Application number
PCT/EP2020/075912
Other languages
English (en)
Inventor
Davida Frieda DECORTE
Luc Jean-Pierre Marcel BLOMMAERT
Lawrence Fabian Batenburg
Irene Antoinette Petra Hovens
Original Assignee
Mattex International Sarl
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 Mattex International Sarl filed Critical Mattex International Sarl
Priority to US17/761,048 priority Critical patent/US20220341091A1/en
Priority to EP20768644.5A priority patent/EP4031702A1/fr
Priority to AU2020347835A priority patent/AU2020347835A1/en
Publication of WO2021053041A1 publication Critical patent/WO2021053041A1/fr

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Classifications

    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0063—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf
    • D06N7/0065—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by the pile
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0063—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf
    • D06N7/0071—Floor covering on textile basis comprising a fibrous top layer being coated at the back with at least one polymer layer, e.g. carpets, rugs, synthetic turf characterised by their backing, e.g. pre-coat, back coating, secondary backing, cushion backing
    • 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
    • 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
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2201/00—Chemical constitution of the fibres, threads or yarns
    • D06N2201/02—Synthetic macromolecular fibres
    • D06N2201/0254—Polyolefin fibres
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2203/00—Macromolecular materials of the coating layers
    • D06N2203/04—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D06N2203/042—Polyolefin (co)polymers
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/06—Properties of the materials having thermal properties
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N2209/00—Properties of the materials
    • D06N2209/14—Properties of the materials having chemical properties
    • D06N2209/141—Hydrophilic

Definitions

  • the invention relates to artificial turf, synthetic backing material, synthetic filament, and cooling of artificial turf.
  • Artificial turf also commonly known as, e.g., synthetic turf, artificial grass, and synthetic grass, or simply, turf
  • synthetic turf has been used prominently in sports fields and landscaping as an alternative to (natural) grass.
  • properties of artificial turf have improved, it has also become a popular choice for pets, for use in playgrounds, gardens, and in other leisure and commercial applications.
  • artificial turf offers multiple benefits that grass cannot, such as no fertilising required, and improved durability and resilience
  • a major drawback to artificial turf is heat.
  • Artificial turf can get very hot under certain conditions, especially when sunlight hits its surface. When compared to grass, artificial turf tends to hold more heat, often creating a surface that is too hot to touch, thereby possibly leading to burn wounds. And even in some cases, when the surface of the artificial turf gets too hot, beneficial properties of the turf may get lost.
  • artificial turf is protected from overheating by planting trees, bushes, and shrubbery in its vicinity, such that shadows provide relief from hot sunshine and deep roots help keep the ground cooler by holding water.
  • Another possibility is to switch to an infill that is specifically designed to keep artificial turf cool.
  • an evaporative cooling system with which water is circulated around the artificial turf lawn helps lowering the surface temperature.
  • WO-A-2005/111281 describes a synthetic fibre that reduces the risk of injury to players when used on an artificial grass sports field.
  • the fibre is an extruded core-shell system.
  • CN-B-103 014 898 mentions artificial grass fibres having a hydrophilic surface.
  • the artificial grass fibres comprise a matrix resin, a colour masterbatch, an auxiliary, and a hydrophilic modifier.
  • WO-A-2008/150156 describes artificial grass composed of fibres comprising a core and a cladding.
  • EP-A-2 899 301 discloses a method for producing an artificial turf fibre that has hydrophilic properties.
  • the fibre comprises 63 to 88 % of polyolefin, 5 to 30 % of zeolite, and 7 % masterbatch and UV- stabilisers.
  • This composition does not form a blend, but the zeolite filler will be present as solid agglomerates or chunks. Moreover, amongst other the zeolite filler leads to undesirable wear resistance, roughness, resilience, and stiffness.
  • the invention aims at improving the water retention of artificial turf, especially for artificial turf comprising synthetic turf filaments based on linear low-density polyethylene.
  • the invention further aims at improving the water retention of artificial turf comprising a synthetic backing, especially wherein the backing is based on polypropylene.
  • artificial turf comprising synthetic turf filaments
  • the synthetic turf filaments comprise a blend
  • the blend comprises 65-99.5 % by total weight of the blend of a polyolefin, and 0.5-35 % by total weight of the blend of a hydrophilic polymer, wherein the polyolefin is a polyethylene, a polypropylene, or a combination thereof, and wherein the artificial turf is preferably in the form of a tile or carpet.
  • artificial turf comprising a synthetic backing
  • the synthetic backing comprises a blend
  • the blend comprises 65-99.5 % by total weight of the blend of a polypropylene, and 0.5-35 % by total weight of the blend of a hydrophilic polymer, preferably a hydrophilic polymer as described herein, and/or in an amount as described herein, wherein the artificial turf is preferably in the form of a tile or carpet.
  • a synthetic backing material comprising a blend as described herein.
  • a synthetic filament comprising a blend as described herein.
  • a method of cooling artificial turf comprising inserting a plurality of a synthetic turf filament as described herein into artificial turf.
  • artificial turf as used herein is meant to refer to a substrate layer having synthetic turf filaments projecting therefrom, preferably upwardly and/or with different curl intensities, such that it visually resembles natural turf.
  • the substrate layer may be a carpet-like (surface) cover having substantially upright, or upright, synthetic turf filaments, or synthetic turf filaments attached thereto having one or more curl intensities.
  • the synthetic turf filaments may be attached to the substrate layer by mechanically connecting the filaments to the layer, for example, by means of a tufting, weaving, or knitting technique.
  • blend as used herein is meant to refer to a physical mixture of two or more different species, wherein at least one species is dispersed in another species which acts as a medium.
  • the blend as described herein is a polymer blend, i.e. a macroscopically homogeneous mixture of two or more species of polymer.
  • the blend is sufficiently stable to form a stable material having unique properties.
  • filament as used herein is meant to refer to a yarn, i.e., a strand, such as a twisted strand, of fibre(s), e.g., used for tufting, weaving, or knitting.
  • Filament may refer to the term “fibre” in that a fibre is a single elongated piece of a given material, roughly round in cross-section, and often twisted with other fibres to form thread.
  • the term filament refers to a thread, thread-like structure, fibre, fibril, and wire-like structure.
  • the filaments as described herein may be in all sorts of sizes and shapes.
  • the filament may be in the form of stem, flat, wave, v-shape, s-shape, c-shape, u-shape, w-shape, or hollow.
  • the size and shape of the filaments are adapted to their application.
  • hydrophilic polymer as used herein is meant to refer to a polymer that comprises polar and/or charged functional groups, rendering the polymer capable to absorb water, e.g., equivalent to multiple of times the polymer’s own weight, and possibly even soluble in water.
  • synthetic turf filament as used herein is meant to include fibrillated tape yarn, texturised or thatch yarns, coextrude tape yarn, monotape and monofilament yarn.
  • a “fibrillated tape” or “fibrillated tape yarn” is a cast extruded film cut into tape (typically about 1 cm width), the film stretched and long slits cut (fibrillated) into the tape giving the tape the dimensions of grass blades.
  • a “monofilament yarn” is extruded into individual filaments with a desired cross-sectional shape and thickness followed by filament orientation and relaxation in hot ovens.
  • the synthetic turf filament forms the synthetic (polymer) strands for the artificial turf. Artificial turf requires amongst others resilience (spring back), toughness, flexibility, extensibility, and durability. Consequently, synthetic turf filament preferably excludes filaments for fabrics (i.e. woven and/or knit fabrics).
  • tile as used herein is meant to refer to slabs, sods, slices, blocks, derivatives thereof, and alike.
  • the shape of the tiles is not necessarily square or rectangular, but can, for example, also be circular or rhombic.
  • the artificial turf of the invention comprises synthetic turf filaments.
  • the artificial turf comprises a plurality of synthetic turf filaments.
  • the filaments comprise a blend, wherein the blend comprises a polyolefin, wherein the polyolefin is a polyethylene, a polypropylene, or a combination thereof.
  • the polyolefin comprises or is polyethylene.
  • the polyethylene may, for example, comprise one or more selected from the group consisting of very low- density polyethylene, low- density polyethylene, linear low-density polyethylene, medium-density polyethylene, and high-density polyethylene.
  • the polyethylene comprises one or more selected from very low-density polyethylene, low-density polyethylene, linear low-density polyethylene, and high-density polyethylene. More preferably, the ethylene comprises linear low-density polyethylene and/or high-density polyethylene. Linear low density polyethylene is preferably used, because the low density gives a product which is very soft to the touch.
  • the polyethylene that may be present in the blend may have a density, as measured according to ISO 1183, in the range of 0.88-0.99 g/cm 3 , preferably 0.90-0.96 g/cm 3 , more preferably 0.91-0.94 g/cm 3 .
  • the polyethylene present in the blend may have a melt flow index, as measured according to ISO 1133 at a load of 2.16 kg and at a temperature of 190 °C, of 0.1-10 g/10 min, preferably 0.5-7.5 g/10 min, more preferably 1-5 g/10 min.
  • the polyethylene present in the blend may have a melting point, as measured according to ISO 11357, in the range of 100-180 °C, preferably 105-160 °C, more preferably 115-140 °C.
  • the blend may also comprise polypropylene, or a combination of polyethylene and polypropylene.
  • Polypropylenes include homopolymers of propylene, copolymers of propylene and other olefins (including random copolymers and block copolymer), and terpolymers of propylene, ethylene and dienes.
  • Combinations of polyethylene and polypropylene include blends of polypropylene and polyethylene, random copolymers of ethylene and propylene, as well as block copolymers of ethylene and propylene.
  • polypropylene was considered less suitable for artificial turf than polyethylene, inter alia, because polypropylene has a comparatively high coefficient of friction, so that when someone slides with their skin along the turf burns can result.
  • this problem is reduced by the inclusion of a hydrophilic polymer in the blend.
  • the blend comprises 65-99.5 % by total weight of the blend of the polyolefin, wherein the polyolefin is a polyethylene, a polypropylene, or a combination thereof.
  • the blend may comprise 65-95 % by total weight of the blend of polyethylene.
  • the blend may comprise 70 % or more, 75 % or more, or 80 % or more of polyolefin.
  • the blend may comprise 90 % or less, or 85 % or less of polyolefin.
  • the blend comprises 70-85 % by total weight of the blend of polyolefin, and more preferably 77.5-82.5 %.
  • the blends as described herein further comprise a hydrophilic polymer.
  • the hydrophilic polymer may comprise one or more synthetic polymers and/or one or more natural polymers.
  • the synthetic polymer may be selected from the group consisting of polyvinyl alcohol, polyvinyl acetate, polyvinyl pyrrolidone, polyacrylic acid, polyacrylamide, polyethylene glycol, polyurethane, /V-(2-hydroxypropyl)methacrylamide, xanthane gum, and derivatives thereof.
  • the natural polymer may, for example, be selected from the group consisting of pectines and salts thereof, chitine, chitosan, dextran, cellulose ethers, such as hydroxypropylcellulose, hydroxypropylmethylcellulose and hydroxyethylcellulose, starch, and derivatives thereof.
  • the hydrophilic polymer comprises one or more hydroxyl groups.
  • the hydrophilic polymer comprises polyvinyl alcohol and/or polyvinyl acetate.
  • the hydrophilic polymers surprisingly seem to act as flame retardants, in particular polyvinyl alcohol and polyvinyl acetate. As a result, the use of these polymers allow to reduce the amount of flame retardant additive in the synthetic turf filaments.
  • the hydrophilic polymer is preferably an extrudable hydrophilic polymer.
  • the hydrophilic polymer has a T of 40 °C or more, such as 50 °C or more, 60 °C or more, 65 °C or more, 70 °C or more, or 80 °C or more.
  • the hydrophilic polymer has a T g of 50-60 °C.
  • the blends as described herein comprise 0.5-35 % by total weight of the blend of hydrophilic polymer.
  • the blend may comprise 1-30 % by total weight of the blend of hydrophilic polymer.
  • the amount of hydrophilic polymer may be 5 % or more by total weight of the blend, such as 10 % or more, or even 15 % or more.
  • the amount of hydrophilic polymer may be 25 % or less by total weight of the blend, such as 20 % or less, or 15 % or less.
  • the blend comprises 0.5-10 % by total weight of the blend of hydrophilic polymer, and more preferably 2-6 %.
  • the blend as described herein may comprise an ionomer resin.
  • An ionomer resin is a polymer composed of electrically neutral repeating units as well as ionised repeating units, which are covalently bonded to the polymer backbone as pendant group moieties. Usually, 5-15 mol% of the repeating groups are ionised repeating units.
  • the ionised repeating units may comprise one or more ionic groups selected from sulphonate, phosphate, phosphonate, and carboxylate ionic groups.
  • the ionised repeating units comprise carboxylate ionic groups.
  • Suitable ionomers include copolymers comprising 5 to 25 % by weight of ionic comonomer, such as 10 to 20 %.
  • the ionomer resin may have a neutralisation ratio of 10 % or more.
  • the ionomer resin may be a random copolymer of poly(ethylene-co-(meth)acrylic) acid.
  • the copolymer may be at least partially neutralised.
  • the copolymer may comprise (meth)acrylic acid comonomer that is acrylic acid comonomer, methacrylic acid comonomer or a combination of acrylic acid and methacrylic acid comonomers.
  • the poly(ethylene-co-(meth)acrylic) acid copolymer may incorporate the (meth)acrylic acid comonomer in an incorporation ratio of 20 mol% or less, such as 15 mol% or less, or 10 mol% or less.
  • the ionomer resin may be a neutralised polyvinyl sulphonic acid.
  • the ionomer resin may be a neutralised sulphonated derivative of a poly(ether ether-keton).
  • Suitable examples of commercial ionomer resins include those available under the trade designation SurlynTM ionomers, EntiraTM ionomers, and NucrelTM ionomors, each available from The Dow Chemical Company.
  • the ionomer resin is applied in an amount of 0.1 % or more by total weight of the blend, such as 0.2 % or more, 0.3 % or more, 0.4 % or more, or 0.5 % or more.
  • the ionomer resin is applied in an amount of 10 % or less by total weight of the blend, such as 9 % or less, 8 % or less, 7 % or less, or 6 % or less.
  • the blends as described herein may further comprise one or more additives.
  • the additives may be selected from the group consisting of compatibilisers, flame retardants, colouring agents, processing aids, antioxidants, UV- stabilisers, heat stabilisers, and pigments.
  • the blend may comprise one or more compatibilisers such that an immiscible blend of polymers become more stable.
  • the blend may comprise a functionalised polyethylene having one or more hydrophilic groups grafted on a polyethylene as compatibiliser.
  • the functionalised polyethylene may comprise one or more hydrophilic groups selected from the group consisting of anhydride groups, such as acid anhydrides, amine groups, thiamine groups, hydroxyl groups, cyanide groups, carboxylic acid groups, sulphonic acid groups, amide groups, thioamide groups, imide groups, sulphonamide groups, thiol groups, and derivatives thereof.
  • the functionalised polyethylene may comprises one or more anhydride groups, carboxylic acid groups, hydroxyl groups, and/or derivatives thereof.
  • maleic anhydride groups, ethylene acrylic acid groups, such as ethyl methyl acrylate groups, ethylene vinyl alcohol groups, and/or derivatives thereof are selected.
  • the blends may comprise 1-10 % by total weight of the blend of the functionalised polyethylene.
  • the blend may comprise 1.5-9.5 % by total weight of the blend of functionalised polyethylene, such as 2 % or more, 2.5 % or more, 3 % or more, or 3.5 % or more, and 9 % or less, 8.5 % or less, 8 % or less, or 7.5 % or less.
  • the blend comprises 2-8 % by total weight of the blend of functionalised polyethylene, and more preferably 3-7 %.
  • Functionalised polyethylene By using functionalised polyethylene the hydrophilicity of the filaments and/or the compatibility of polyethylene and hydrophilic polymer may improve. Functionalised polyethylene may stabilise an otherwise immiscible blend of polymers.
  • the blend and/or the synthetic turf filaments as described herein may further comprise a total amount of additives of 0-25 % by total polymer weight.
  • the amount of additives in the blend may be 0.1 % or more by total weight of the blend, such as 1 % or more, 3 % or more, or 6 % or more.
  • the amount of additives in the blend may be 22.5 % or less by total weight of the blend, such as 21 % or less, 17.5 % or less, or 12.5 % or less.
  • the blend comprises 0.1-20 % by total weight of the blend of total additives, and more preferably 0.5-15 %.
  • the amount of the total flame retardants may be 2.5 % or more by total weight of the blend, such as 5 % or more, 7.5 % or more, 10 % or more, or 12.5 % or more.
  • the amount of total flame retardants can be relatively low, because the hydrophilic polymer provides some flame retardant properties.
  • the amount of total flame retardants can be 25 % or less by total weight of the blend, such as 22.5 % or less, 20 % or less, or 17.5 % or less.
  • the synthetic turf filaments preferably have an amount of fillers, such as zeolites, of 5 % or less by total weight of the filament, preferably 3 % or less, even more preferably, 2 % or less, and most preferably 1 % or less.
  • fillers such as zeolites
  • High amounts of filler can negatively affect properties such as wear resistance, roughness, resilience and/or stiffness of the synthetic turf filaments.
  • the artificial turf comprising polyethylene, comprises synthetic turf filaments.
  • the filaments may have an average Young’s modulus, as measured according to ISO 527, in the range of 1-50 cN/tex.
  • the average Young’s modulus of the synthetic turf filaments may be 2-40 cN/tex, such as 6 cN/tex or more, 8 cN/tex or more, 10 cN/tex or more, 12 cN/tex or more, or 15 cN/tex or more, and 36 cN/tex or less, 33 cN/tex or less, 28 cN/tex or less, 25 cN/tex or less, 22 cN/tex or less.
  • the average Young’s modulus of the synthetic turf filaments is 3-30 cN/tex, more preferably 5-20 cN/tex.
  • artificial turf comprising synthetic turf filaments
  • the filaments comprise a blend, wherein the blend comprises 65-99.5 % by total weight of the blend of linear low-density polyethylene, and 0.5-35 % by total weight of the blend of polyvinyl alcohol.
  • the synthetic turf filaments comprise a blend, wherein the blend comprises 65-95 % by total weight of the blend of a polyolefin, 0.5-30 % by total weight of the blend of a hydrophilic polymer, and 0.1-10 % by total weight of the blend of an ionomer resin, wherein the polyolefin is a polyethylene, a polypropylene, or a combination thereof.
  • an artificial turf comprising synthetic turf filaments
  • the filaments comprise a blend, wherein the blend comprises 65-95 % (preferably 60-90 %) by total weight of the blend of linear low-density polyethylene, and 0.5-3 % (preferably 1-2.5 %) by total weight of the blend of polyvinyl alcohol, and 0.1-10 % (preferably 0.5-8 %) by total weight of the blend of an ionomer resin.
  • the synthetic turf filaments of the artificial turf advantageously retain water.
  • the filaments comprise a blend, wherein the blend comprises hydrophilic polymer which has the tendency to absorb water.
  • the water can be absorbed from, for example, the air (in the form of rain, fog, etc.), absorbed from water evaporating from the soil, and/or can be supplied by a watering installation. When water is absorbed, the temperature per time moment is lowered.
  • the filaments as described herein comprise hydrophilic areas dispersed throughout the filaments. The presence of these hydrophilic areas have at least an advantageous effect on the improved water retention, and possibly also on an even lower temperature per time moment, when compared to known synthetic turf filaments.
  • the total amount of water required to wet a specific area for a specified time window will be less as compared to a conventional artificial turf. This is important for artificial turf used for playing hockey, in particular at a global level.
  • the invention thus allows as cost reduction in terms of amount of water. Additionally, a reduced amount of water consumption is ecologically friendly.
  • the invention also provides artificial turf comprising a synthetic backing, wherein the synthetic backing comprises a blend, which blend comprises i) 65-99.5 % by total weight of the blend of a polypropylene, and ii) 0.5-35 % by total weight of the blend of a hydrophilic polymer, preferably a hydrophilic polymer as described herein, and/or in an amount as described herein, wherein the artificial turf is preferably in the form of a tile or carpet.
  • the synthetic backing comprises a blend, which blend comprises i) 65-99.5 % by total weight of the blend of a polypropylene, and ii) 0.5-35 % by total weight of the blend of a hydrophilic polymer, preferably a hydrophilic polymer as described herein, and/or in an amount as described herein, wherein the artificial turf is preferably in the form of a tile or carpet.
  • the blend for the synthetic backing comprises 65-99.5 % by total weight of the blend of polypropylene.
  • the blend may comprise 65-95 % by total weight of the blend of polypropylene.
  • the amount of polypropylene in the blend may, for instance, be 70 % or more by total weight of the blend, such as 75 % or more, or 80 % or more.
  • the amount of polypropylene in the blend may be 90 % or less by total weight of the blend, such as 85 % or less.
  • the blend comprises 70-85 % by total weight of the blend of polypropylene, and more preferably 77.5-82.5 %.
  • the polypropylene may, for example, be selected from the group consisting of polypropylene homopolymer, such as SABIC ® PP 500P, or SABIC ® PP 506P, polypropylene copolymer, such as polypropylene random copolymer and polypropylene block copolymer, and high melt strength polypropylene.
  • polypropylene homopolymer such as SABIC ® PP 500P, or SABIC ® PP 506P
  • polypropylene copolymer such as polypropylene random copolymer and polypropylene block copolymer
  • high melt strength polypropylene high melt strength polypropylene.
  • an artificial turf comprising the synthetic backing, as described herein, wherein the synthetic backing comprising a polypropylene homopolymer.
  • the homopolymer can have a melt flow index, as measured according to ISO 1133 at a load of 2.16 kg and at a temperature of 230 °C, of 1-25 g/10 min, preferably 2-20 g/10 min, more preferably 2-4 g/10 min.
  • the homopolymer can have a density, as measured according to ISO 1183, in the range 0.90-0.95 g/cm 3 .
  • the synthetic turf filaments as described herein, and/or the synthetic backing as described herein, are in particular suitable for artificial turf, e.g., for landscapes, such as commercial, recreational, and residential landscapes, parks, sports fields, such as sports fields for contact sports, ball sports, and athletics, playgrounds, gardens, and pets.
  • the invention further provides synthetic backing material comprising a blend as described herein, in particular the blend comprising polypropylene.
  • Artificial turf comprising the synthetic backing as described herein has improved tuft-lock. It is believed that the presence of hydrophilic polymer within the synthetic filaments and/or synthetic backing advantageously improves the tuft-lock of artificial turf through improved wetting of the (hydrophilic) synthetic filaments, such as the synthetic turf filaments, as described herein by the latex (water emulsion) in the stitch/loop.
  • the hydrophilic character of the filaments improves the ability of the water emulsion to penetrate in between the filaments.
  • an artificial turf wherein the artificial turf filaments and the synthetic backing as described herein are combined.
  • the invention further provides artificial turf, comprising synthetic turf filaments, wherein the synthetic turf filaments comprise a filament blend, which filament blend comprises 65-99.5 % by total weight of the filament blend of a polyolefin, 0.5-35 % by total weight of the filament blend of a hydrophilic polymer, and optionally an ionomer resin, wherein the polyolefin is a polyethylene, a polypropylene, or a combination thereof, wherein said artificial turf further comprises a synthetic backing, wherein the synthetic backing comprises a backing blend, which backing blend comprises 65-99.5 % by total weight of the backing blend of a polypropylene, and 0.5-35 % by total weight of the backing blend of a hydrophilic polymer.
  • the invention further provides synthetic filament comprising a blend as described herein, in particular the blend comprising polyethylene.
  • the synthetic filament may be used in floor covering.
  • floor covering as used herein is meant to refer to a covering for a floor, i.e., a material applicable on a floor structure.
  • the floor under the floor covering is suitably called a subfloor.
  • the subfloor may be an earthen floor and/or ground floor, in particular a solid ground floor.
  • the synthetic filament can be used in carpets and carpet-like structures.
  • carriers and “carpet-like structures” as used herein are meant to refer to substrate layers to which filaments are attached, that have, for example, been attached by mechanically connecting the filaments to the substrate layer.
  • the synthetic filament is attached to substrate layers predominantly comprising synthetic filaments instead of filaments made of natural material (i.e., synthetic carpets and synthetic carpet-like structures).
  • means of a tufting, weaving, or knitting technique is suitable for connecting the synthetic filament to a substrate layer.
  • the resulting substrate layer may have substantially upright, or upright, synthetic filaments projecting upwardly.
  • the resulting preferably comprises a backing, such as the synthetic backing as described herein.
  • the synthetic filament as described herein, comprising a blend as described herein, in the form of a synthetic turf filament.
  • the synthetic filament comprising a blend, as described herein, in the form of a synthetic carpet filament.
  • a carpet such as a synthetic carpet, comprising the synthetic filament as described herein, wherein the synthetic filament comprises a blend as described herein.
  • the carpet, or synthetic carpet may further comprise a backing material comprising a blend, as described herein.
  • the invention further provides a method of cooling artificial turf, comprising inserting a plurality of a synthetic turf filament as described herein into artificial turf.
  • a synthetic turf filament as defined herein for cooling artificial turf wherein a plurality of the synthetic turf filament is inserted into artificial turf.
  • Extrusion experiments were performed on a 25 mm twin-screw extruder (L/D40). Different compounds were prepared and extruded into tapes of 15 mm width x 1 mm thickness (w x t x ⁇ ).
  • a first set of experiments (MY19001 to MY19008) was performed with LLDPE A, a LLDPE type C4 for grass production having a melt flow index as measured according to ISO 1133 at a load of 2.16 kg and at a temperature of 190 °C of 2.8 g/10 min, a density as measured according to ISO 1183 of 0.918 g/cm 3 , and a melting point as measured by DSC of 121 °C, and 25 phr of extrudable PVOH (having a T of 50-60 °C) with different compatibilising agents.
  • Example 1 Similar experiments as in Example 1 (MY19010 to MY19027) with lower PVOH content are performed, based on LLDPE B, a LLDPE type C4 for grass production having a melt flow index as measured according to ISO 1133 at a load of 2.16 kg and at a temperature of 190 °C of 1.0 g/10 min, a density as measured according to ISO 1183 of 0.918 g/cm 3 , and a melting point as measured by DSC of 121 °C.
  • a third set of samples was prepared (MY19028 to MY19039), equal to the set of Example 1, based on LLDPE B. Afterwards, SEM analysis was performed by a FEI Desktop Electron Microscope (see figures 1 and 2). Samples were cross sectioned after cryogenic treatment by liquid nitrogen.
  • a fourth set of experiments (MY19065 to MY19089) was performed with LLDPE C, a LLDPE type C4 for grass production having a melt flow index as measured according to ISO 1133 at a load of 2.16 kg and at a temperature of 190 °C of 2.0 g/10 min, a density as measured according to ISO 1183 of 0.918 g/cm 3 , and a melting point as measured by DSC of 122 °C and 8 phr of extrudable PVOH (having a T g of 50-60 °C) with different ionomers based on a copolymer of ethylene and methylacrylate .
  • Extrusion experiments were performed on a 25 mm twin-screw extruder (L/D40). Different compounds were prepared and extruded into tapes of 15 mm width x 1 mm thickness (w x t x ⁇ ), then elongated 4.5 times into tapes of 2.5 mm width x 200 pm thickness.
  • a fifth set of experiments (MY19093 to MY19117) was performed with LLDPE C and 8 phr of extrudable PVOH (having a T g of 50-60 °C) with different ionomers based on a copolymer of ethylene and methylacrylate.
  • Extrusion experiments were performed on an artificial yarn extrusion production line.
  • a set of experiments (TYR200003 to TYR200005) were performed with compounds similar to the fifth set, based on LLDPE C. These compounds were extruded into artificial grass fibres. Cyclic water absorption and release tests are performed on sample specimen of 1.00 m length by mass determination. Water absorption values of maximum 4 wt.% were reported (see figure 4).

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Road Paving Structures (AREA)

Abstract

L'invention concerne un gazon artificiel, un matériau de support synthétique, un filament synthétique et le refroidissement du gazon artificiel. Le gazon artificiel comprend des filaments de gazon synthétique, les filaments de gazon synthétique comprennent un mélange, le mélange comprend 65 à 99,5 % en poids total du mélange d'une polyoléfine, et 0,5 à 35 % en poids total du mélange d'un polymère hydrophile, la polyoléfine étant du polyéthylène, du polypropylène ou n'importe quelle combinaison de ceux-ci, et le gazon artificiel se présentant de préférence sous la forme d'une moquette à carreaux.
PCT/EP2020/075912 2019-09-16 2020-09-16 Gazon artificiel retenant l'eau WO2021053041A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US17/761,048 US20220341091A1 (en) 2019-09-16 2020-09-16 Water-retaining artificial turf
EP20768644.5A EP4031702A1 (fr) 2019-09-16 2020-09-16 Gazon artificiel retenant l'eau
AU2020347835A AU2020347835A1 (en) 2019-09-16 2020-09-16 Water-retaining artificial turf

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EP19197624.0 2019-09-16
EP19197624 2019-09-16

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EP (1) EP4031702A1 (fr)
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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05106112A (ja) * 1991-10-14 1993-04-27 Mitsubishi Rayon Co Ltd 耐久親水性を有するポリオレフイン繊維
WO2005111281A1 (fr) 2004-05-19 2005-11-24 Ten Cate Thiolon B.V. Fabrication d'une fibre synthetique pour pelouse artificielle de terrain de sports, et fibre synthetique
WO2008150156A1 (fr) 2007-06-07 2008-12-11 Tapijtfabriek H. Desseaux N.V. Gazon artificiel à base de fibres constituées d'une âme et d'une gaine et pelouse artificielle ainsi réalisée
US20120258811A1 (en) * 2009-02-09 2012-10-11 Sapturf, Llc Synthetic turf having cooling layer
CN103014898A (zh) 2013-01-07 2013-04-03 江苏共创人造草坪有限公司 一种表面亲水的人造草纤维及人造草坪
EP2899301A1 (fr) 2014-01-28 2015-07-29 Mondo Tufting, S.A. Procédé de production de fibre artificielle, fibre artificielle produite et utilisation associée
WO2019006089A1 (fr) * 2017-06-30 2019-01-03 Dow Global Technologies Llc Filaments de gazon synthétique et articles fabriqués à partir de ceux-ci
CN109594139A (zh) * 2018-12-23 2019-04-09 三河市京纳环保技术有限公司 一种聚烯烃丝状材料用速效抗菌功能母粒及其制备方法与它的用途
EP3467168A1 (fr) * 2017-10-06 2019-04-10 Polytex Sportbeläge Produktions-GmbH Procédé permettant de retarder et réduire la réversion de texture d'un fil de gazon artificiel texturé

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH05106112A (ja) * 1991-10-14 1993-04-27 Mitsubishi Rayon Co Ltd 耐久親水性を有するポリオレフイン繊維
WO2005111281A1 (fr) 2004-05-19 2005-11-24 Ten Cate Thiolon B.V. Fabrication d'une fibre synthetique pour pelouse artificielle de terrain de sports, et fibre synthetique
WO2008150156A1 (fr) 2007-06-07 2008-12-11 Tapijtfabriek H. Desseaux N.V. Gazon artificiel à base de fibres constituées d'une âme et d'une gaine et pelouse artificielle ainsi réalisée
US20120258811A1 (en) * 2009-02-09 2012-10-11 Sapturf, Llc Synthetic turf having cooling layer
CN103014898A (zh) 2013-01-07 2013-04-03 江苏共创人造草坪有限公司 一种表面亲水的人造草纤维及人造草坪
CN103014898B (zh) * 2013-01-07 2014-11-12 江苏共创人造草坪有限公司 一种表面亲水的人造草纤维及人造草坪
EP2899301A1 (fr) 2014-01-28 2015-07-29 Mondo Tufting, S.A. Procédé de production de fibre artificielle, fibre artificielle produite et utilisation associée
WO2019006089A1 (fr) * 2017-06-30 2019-01-03 Dow Global Technologies Llc Filaments de gazon synthétique et articles fabriqués à partir de ceux-ci
EP3467168A1 (fr) * 2017-10-06 2019-04-10 Polytex Sportbeläge Produktions-GmbH Procédé permettant de retarder et réduire la réversion de texture d'un fil de gazon artificiel texturé
CN109594139A (zh) * 2018-12-23 2019-04-09 三河市京纳环保技术有限公司 一种聚烯烃丝状材料用速效抗菌功能母粒及其制备方法与它的用途

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US20220341091A1 (en) 2022-10-27

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