CN108824128B - Preparation method of recyclable artificial turf - Google Patents
Preparation method of recyclable artificial turf Download PDFInfo
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- CN108824128B CN108824128B CN201810563478.3A CN201810563478A CN108824128B CN 108824128 B CN108824128 B CN 108824128B CN 201810563478 A CN201810563478 A CN 201810563478A CN 108824128 B CN108824128 B CN 108824128B
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- 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
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D123/00—Coating compositions based on homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Coating compositions based on derivatives of such polymers
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- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
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- 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
Abstract
The invention relates to a preparation method of a recyclable artificial lawn, which comprises grass fibers, a base fabric and an adhesive layer, wherein the base fabric is arranged below the grass fibers, the adhesive layer is arranged below the base fabric, and the preparation method comprises the following steps of: 95-100 parts of aqueous polyolefin dispersion, 0.5-1 part of thickening agent, 1-5 parts of deionized water and 2-3 parts of pigment and filler, then coating and baking the lawn twice respectively, and finally punching and cutting to obtain the recyclable artificial lawn. The preparation method is simple, the steps are easy to operate, the prepared recyclable artificial turf has the wiredrawing performance such as breaking strength, elongation, wiredrawing section and appearance which meet the requirements of producing the artificial turf by re-wiredrawing, and the recyclable artificial turf has better water resistance.
Description
Technical Field
The invention relates to a recyclable artificial lawn, and belongs to the technical field of artificial lawn preparation.
Background
After the traditional artificial turf is tufted, a last back gluing process is carried out, and styrene-butadiene latex or polyurethane emulsion is generally used for coating and baking, so that the grass filaments are firmer in the base fabric, and the extraction force of the grass filaments is increased. The straw filament is generally formed by drawing polyethylene PE or polypropylene PP plastics, and the base fabric is woven by polypropylene PP plastics. When artificial turf is to be recycled after some years of use, one encounters great challenges and difficulties. Firstly, polyethylene PE or polypropylene PP plastic and styrene-butadiene latex or polyurethane emulsion are two completely different chemical substances, have different structures and properties, and are almost impossible to recycle without crushing and separating; however, the physical separation and other chemical separation of mechanical crushing must be carried out by a plurality of physical and chemical methods, so that not only is the dust and the waste generated huge secondary pollution in the separation process, but also the separated limited substances have extremely low utilization value, can not be completely separated clearly, and have huge cost; is an uneconomical, non-recyclable product life cycle; millions of tons of waste artificial lawns cannot be recycled due to the non-recyclability of the existing artificial lawns, so that not only resources are seriously wasted, but also serious secondary polluted air and environment are formed by unreasonable incineration or low-grade separation treatment which is uneconomical and can not be recycled continuously; secondly, no matter polyethylene PE or polypropylene PP plastic or styrene-butadiene latex or polyurethane emulsion can not be degraded in a short period, and can not be naturally absorbed even if buried for a hundred years, so that the product life cycle is one-way and non-recyclable, and the economy can not be continuously developed.
CN102808368 discloses a recyclable artificial lawn and a preparation method thereof, wherein the artificial lawn comprises artificial grass filaments, a base fabric and a back adhesive EVA hot melt adhesive layer; the preparation method comprises the steps of tufting the artificial grass filaments on the base fabric by using a planting needle, then carrying out hot melting on the EVA solid to 160-180 ℃, and coating the EVA solid on the back of the base fabric by a dripping method. The EVA hot melt adhesive is used as the back adhesive layer of the artificial lawn, although the EVA hot melt adhesive can be recycled to a certain extent, the production efficiency is extremely low, the practical economic feasibility is not provided, and no corresponding equipment is available at present; moreover, EVA contains a certain amount of vinyl acetate, which has negative influence on the physical properties after recovery, and the utilization value of the recovered materials is extremely low.
CN103603253 discloses a recyclable artificial turf and a preparation method thereof, wherein the artificial turf comprises artificial grass filaments, a base fabric and a back adhesive, wherein the back adhesive is a polyolefin back adhesive layer prepared from polyolefin materials; the preparation method comprises tufting artificial grass filaments on a base fabric by using a needle, and attaching a film layer made of Polyethylene (PE), ethylene-vinyl acetate copolymer (EVA) or polyethylene octene co-elastomer (POE) material to the back of the lawn which is stretched and translated. The incomplete polyolefin and incomplete ethylene polymer material containing EVA adopted in the patent can be recycled as a back glue layer of an artificial lawn to a certain extent, but have several problems, firstly, the EVA contains a vinyl acetate component, so that the elasticity and strength retention rate for recycling are seriously reduced, more deadly, the components are incompatible, and the physical properties after recycling and granulation are seriously reduced, and then the recycling value is hardly realized. Second, additional equipment is necessary, namely a T-die head is installed on the extruder, which is non-standard equipment and the investment and return are difficult to balance. Thirdly, how to smoothly extrude the T-shaped polyolefin film layer with the width of 4 meters to be matched with the lawn for fusion and coagulation to roll up is difficult to industrialize.
Disclosure of Invention
The invention aims to solve the problems and provide a recyclable artificial turf which is simple in preparation method and easy to operate in steps.
The invention adopts the following technical scheme: a recyclable artificial lawn comprises grass fibers, a base fabric and an adhesive layer, wherein the base fabric is arranged below the grass fibers, and the adhesive layer is arranged below the base fabric, and the preparation method comprises the following steps:
(1) preparation of grass fiber: the components are respectively as follows according to parts by weight: 70-30 parts of linear low density polyethylene LLDPE, 30-70 parts of pigment and 0.5-5 parts of dispersing agent, mixing and uniformly stirring all the components in a two-roll plasticator, then heating to 130-190 ℃, and granulating by adopting an extrusion granulator to obtain green or yellow master batches with the particle diameter of 3-6 mm; and then the following components are taken according to parts by weight: 60-80 parts of linear low-density polyethylene LLDPE, 10-15 parts of homopolymerized PP polypropylene resin, 3-6 parts of lubricant stearic acid, 1-2 parts of anti-aging agent and 0.5-2 parts of master batch; mixing the raw materials, placing the mixture in a wire drawing device to obtain straight wires or curved wires, and arranging base cloth below the grass fibers;
(2) preparing a lawn gum raw material: the glue comprises the following components in parts by weight: 95-100 parts of aqueous polyolefin dispersoid, 0.5-1 part of thickening agent, 1-5 parts of deionized water and 2-3 parts of pigment and filler, firstly, weighing the components respectively according to the parts by weight, then uniformly mixing, then adjusting the viscosity of the glue to 400-1000 mPa.s,
(3) conveying: before coating the base fabric with the sizing material, conveying the lawn to a sizing material groove through a conveyor, wherein the conveying speed of the lawn is 1.7-3 m/min;
(4) coating for the first time: a coating roller is arranged in the glue groove, a squeezing roller is arranged above the coating roller, the lawn passes through the middle of the coating roller and the squeezing roller, the coating roller rotates anticlockwise, the linear velocity of a roller wheel of the coating roller is consistent with the linear velocity of the back of the lawn in size and direction, the glue spreading amount of the lawn is 0.3-0.8 kg/m2, and a rear squeezing roller is arranged behind the coating roller;
(5) coating and baking for the first time: putting the coated lawn into a drying tunnel for baking at the temperature of 70-110 ℃ for 4-7 min;
(6) and (3) second coating: spraying the water-based polyolefin dispersion on the surface of the lawn which is coated and baked once by using a spray gun, wherein the spraying amount of the water-based polyolefin dispersion is 0.01-0.3 kg/m 2;
(7) and (3) coating and baking for the second time: conveying the lawn coated for the second time into a drying tunnel for baking, wherein the baking temperature is 70-110 ℃, and the baking time is 2-3.5 min;
(8) punching and cutting: in order to ensure the water permeability of the lawn, a plurality of water seepage holes are drilled in the back of the lawn, the diameter of each water seepage hole is 2-5 mm, and the lawn is cut into rolls after the holes are drilled.
Further, the dispersing agent in the step (1) is low molecular polyethylene wax or stearate.
Further, the thickener in the step (2) is hydroxyethyl cellulose, acrylic acid or polyurethane.
Further, the pigment and filler in the step (2) is calcium carbonate, titanium dioxide, carbon black or barium sulfate.
Further, the coating roller is 3-5 cm below the liquid level of the glue storage tank.
Further, the length of the drying tunnel is 6-10 meters.
Further, the air pressure of the extrusion roller is set to be 0.5-2 kg/cm2。
Further, the rotation direction of the rear extrusion roll is opposite to the rotation direction of the coating roll.
The invention has the following advantages:
(1) the selection of the lawn gum raw material enables the lawn to be completely crushed and utilized into regenerated plastic particles with wire drawing grade, and the wire drawing performance such as breaking strength, elongation, wire drawing section and appearance of the regenerated plastic particles completely meet the requirements of producing artificial lawns by redrawing;
(2) the solid content of the dried lawn back adhesive is high, the water content to be evaporated is low, and the speed of producing the lawn by the drying tunnel is high;
(3) the water resistance of the lawn is good;
(4) the performance of the grass filaments in the lawn system is obviously higher than the pull-out force of the traditional artificial lawn system;
(5) the temperature of the drying tunnel required in the production process is low, almost half of the baking temperature of the traditional artificial turf, and the energy is saved and the emission is reduced;
(6) the method does not need additional equipment investment, can completely utilize the existing equipment, is matched with the material, the formula and the process of the invention, has simple operation and is beneficial to popularization.
(7) The method conforms to the directions of sustainable development of roads, energy conservation and emission reduction, low carbon and green, circular economy, industrial upgrading and social responsibility.
Detailed Description
The present invention will be further described with reference to specific examples.
The aqueous polyolefin dispersions of the present invention are commercially available from dow chemical company, usa;
the first embodiment is as follows:
a recyclable artificial lawn, the preparation method comprises the following steps:
(1) preparation of grass fiber: the components are respectively as follows according to parts by weight: 70 parts of linear low-density polyethylene LLDPE, 30 parts of pigment containing organic phthalocyanine green or organic yellow 151 as pigment and 0.5 part of dispersing agent, mixing and uniformly stirring the components in a two-roll plasticator, heating to 190 ℃, and granulating by adopting an extrusion granulator to obtain green or yellow master batch with the particle diameter of 3 mm; and then the following components are taken according to parts by weight: 80 parts of linear low-density polyethylene LLDPE, 15 parts of homopolymerized PP polypropylene resin, 3 parts of lubricant stearic acid, 1 part of anti-aging agent phosphite ester or thioester, and 0.5 part of green or yellow master batch; mixing the above raw materials, placing in a wire drawing device to obtain straight or curved wires, and arranging a base fabric below the grass fibers;
(2) preparing a lawn gum raw material: the glue comprises the following components in parts by weight: 95 parts of aqueous polyolefin dispersoid, 1 part of thickening agent hydroxyethyl cellulose, 1 part of deionized water and 2 parts of pigment and filler, firstly weighing the components in parts by weight respectively, then uniformly mixing, then adjusting the viscosity of the glue to 400 mPa.s,
(3) conveying: before the back of the lawn is coated with the sizing material, the lawn is conveyed into a sizing material groove through a conveyor, and the conveying speed of the lawn is 1.7 m/min;
(4) coating for the first time: a coating roller is arranged in the glue tank, an extrusion roller is arranged above the coating roller, the lawn passes through the coating roller and the extrusion roller, the coating roller rotates anticlockwise, the linear velocity of a roller wheel of the coating roller is consistent with the linear velocity on the back of the lawn in magnitude and direction, the coating roller is 3cm below the liquid level of the glue tank, and the glue spreading amount of the lawn is 0.3kg/m2The air pressure of the squeeze roll was set to 2kg/cm2；
(5) Coating and baking for the first time: putting the coated lawn into a drying tunnel for baking, wherein the length of the drying tunnel is 10 meters, the baking temperature is 70 ℃, and the baking time is 7 min;
(6) and (3) second coating: spraying clear glue on the surface of the lawn which is coated and baked once by adopting a spray gun, wherein the spraying amount of the clear glue is 0.01kg/m2；
(7) And (3) coating and baking for the second time: sending the lawn coated for the second time into a drying tunnel for baking, wherein the length of the drying tunnel is 6 meters, the baking temperature is 70 ℃, and the baking time is 2 min;
(8) punching and cutting: in order to ensure the water permeability of the lawn, a plurality of water seepage holes are drilled on the back surface of the lawn, the diameter of each water seepage hole is 2mm, and the lawn is cut into rolls after the holes are drilled.
Example two:
a recyclable artificial lawn, the preparation method comprises the following steps:
(1) preparation of grass fiber: the components are respectively as follows according to parts by weight: 68 parts of linear low-density polyethylene LLDPE, 25 parts of pigment containing organic phthalocyanine green or organic yellow 151 as pigment and 2 parts of dispersing agent, mixing and uniformly stirring the components in a two-roll plasticator, heating to 180 ℃, and granulating by using an extrusion granulator to obtain green or yellow master batches with the particle diameter of 4 mm; and then the following components are taken according to parts by weight: 78 parts of linear low-density polyethylene LLDPE, 145 parts of homopolymerized PP polypropylene resin, 2 parts of lubricant stearic acid, 2 parts of anti-aging agent phosphite ester or thioester, and 2 parts of the above green or yellow master batch; mixing the above raw materials, placing in a wire drawing device to obtain straight or curved wires, and arranging a base fabric below the grass fibers;
(2) preparing a lawn gum raw material: the glue comprises the following components in parts by weight: 98 parts of aqueous polyolefin dispersoid, 0.8 part of thickening agent hydroxyethyl cellulose, 3 parts of deionized water and 2.5 parts of pigment and filler, wherein the components are weighed respectively according to the weight parts and then uniformly mixed, and then the viscosity of the glue is adjusted to 800 mPa.s;
(3) conveying: before the back of the lawn is coated with the sizing material, the lawn is conveyed into a sizing material groove through a conveyor, and the conveying speed of the lawn is 2 m/min;
(4) coating for the first time: a coating roller is arranged in the glue tank, an extrusion roller is arranged above the coating roller, the lawn passes through the coating roller and the extrusion roller, the coating roller rotates anticlockwise, the linear velocity of a roller wheel of the coating roller is consistent with the linear velocity of the back surface of the lawn, the coating roller is 4cm below the liquid level of the glue tank, and the glue spreading amount of the lawn is 0.5 kg/m2The air pressure of the squeeze roll was set to 1.5kg/cm2；
(5) Coating and baking for the first time: putting the coated lawn into a drying tunnel for baking, wherein the length of the drying tunnel is 10 meters, the baking temperature is 80 ℃, and the baking time is 5 min;
(6) and (3) second coating: spraying clear glue on the surface of the lawn which is coated and baked once by adopting a spray gun, wherein the spraying amount of the clear glue is 0.2kg/m2；
(7) And (3) coating and baking for the second time: sending the lawn coated for the second time into a drying tunnel for baking, wherein the length of the drying tunnel is 6 meters, the baking temperature is 90 ℃, and the baking time is 3 min;
(8) punching and cutting: in order to ensure the water permeability of the lawn, a plurality of water seepage holes are drilled on the back surface of the lawn, the diameter of each water seepage hole is 4mm, and the lawn is cut into rolls after the holes are drilled.
Example three:
a recyclable artificial lawn, the preparation method comprises the following steps:
(1) preparation of grass fiber: the components are respectively as follows according to parts by weight: 68 parts of linear low-density polyethylene LLDPE, 25 parts of pigment containing organic phthalocyanine green or organic yellow 151 as pigment and 2 parts of dispersing agent, mixing and uniformly stirring the components in a two-roll plasticator, heating to 180 ℃, and granulating by using an extrusion granulator to obtain green or yellow master batches with the particle diameter of 4 mm; and then the following components are taken according to parts by weight: 78 parts of linear low-density polyethylene LLDPE, 145 parts of homopolymerized PP polypropylene resin, 2 parts of lubricant stearic acid, 2 parts of anti-aging agent phosphite ester or thioester, and 2 parts of the above green or yellow master batch; mixing the above raw materials, placing in a wire drawing device to obtain straight or curved wires, and arranging a base fabric below the grass fibers;
(2) preparing a lawn gum raw material: the glue comprises the following components in parts by weight: 100 parts of aqueous polyolefin dispersoid, 0.5 part of thickening agent hydroxyethyl cellulose, 5 parts of deionized water and 3 parts of pigment and filler, wherein the components are weighed respectively according to the parts by weight and then uniformly mixed, and then the viscosity of the glue is adjusted to 1000 mPa.s;
(3) conveying: before the back of the lawn is coated with the sizing material, the lawn is conveyed into a sizing material groove through a conveyor, and the conveying speed of the lawn is 3 m/min;
(4) coating for the first time: a coating roller is arranged in the glue tank, an extrusion roller is arranged above the coating roller, the lawn passes through the coating roller and the extrusion roller, the coating roller rotates anticlockwise, the linear velocity of a roller wheel of the coating roller is consistent with the linear velocity on the back of the lawn in magnitude and direction, the coating roller is 5cm below the liquid level of the glue tank, and the glue spreading amount of the lawn is 0.8 kg/m2The air pressure of the squeeze roll was set to 0.5kg/cm2；
(5) Coating and baking for the first time: putting the coated lawn into a drying tunnel for baking, wherein the length of the drying tunnel is 10 meters, the baking temperature is 110 ℃, and the baking time is 4 min;
(6) and (3) second coating: spraying clear glue on the surface of the lawn which is coated and baked once by adopting a spray gun, wherein the spraying amount of the clear glue is 0.3kg/m2；
(7) And (3) coating and baking for the second time: sending the lawn coated for the second time into a drying tunnel for baking, wherein the length of the drying tunnel is 6 meters, the baking temperature is 110 ℃, and the baking time is 3.5 min;
(8) punching and cutting: in order to ensure the water permeability of the lawn, a plurality of water seepage holes are drilled on the back surface of the lawn, the diameter of each water seepage hole is 5mm, and the lawn is cut into rolls after the holes are drilled.
The recyclable artificial turf prepared in the second embodiment of the invention is recycled, crushed, re-granulated and drawn into grass filaments, the single filament fiber degree of the grass filaments is 1100Dtex, and the section is S-shaped; the PP and PE contents are close, and the pigment and filler contents are close; the artificial turf was observed and tested for recyclability in terms of appearance, breaking strength and elongation from two dimensions:
(1) the single grass filament has breaking strength of 12.7 Newton and elongation of 35.8% under the condition of the same fiber degree of 1100 Dtex.
(2) Likewise 10 filaments form a tuft, the breaking strength is 123.7 newtons and the elongation is 25.7% at a total fiber size of 66000 Dtex.
Comparative example one:
the grass filaments are prepared from a primary new material, the fiber degree of the monofilament of the grass filaments is 1100Dtex, the section of the grass filaments is S-shaped, the breaking strength of the grass filaments is 12 newtons respectively through detection, and the elongation is 37% respectively; when 10 identical monofilaments were used, the total fiber content of the filament bundle was 66000Dtex, the breaking strength was 120N and the elongation was 27%.
Comparative example two:
the traditional artificial turf system adopts Pasteur traditional styrene-butadiene latex Styrofan &7215as a main material of back adhesive, and grass filaments are obtained by recovering, crushing, re-granulating and wire-drawing, wherein after wire-drawing, the rigidity of the system is increased due to the addition of bottom fabric PP, the elongation is reduced, the recovery performance is reduced, more mainly due to the addition of the back adhesive styrene-butadiene latex, the system has different chemical properties and incompatibility with the system, and the crushed, granulated and wire-drawn grass filaments are taken as impurities to influence the recovery performance; the content of PE in various effective polyolefins in the main material is reduced to 40%, the content of PP in the main material is 32%, the grass filaments are rough in appearance and barely drawn under the condition that the fiber degree of the same grass filament single filament is 1100Dtex and the section is also S-shaped, the detected breaking strength is only 9.5 newtons, and the elongation is only 20.7%; the breaking strength was only 94.9 newtons and the elongation was only 18% when a total fiber content of 66000Dtex was obtained with 10 identical 1100 filaments.
Comparative example three:
the traditional artificial turf system adopts Celvolit 1510 of Seranian and traditional vinyl acetate-ethylene copolymer emulsion which does not contain plasticizer as a back glue main material, and is crushed and reproduced into granules after recovery, and because the granules are completely incompatible, the surfaces of the granules are rough and have abnormal white impurities, so that the recovery target of the drawn wires into the grass yarns can not be realized.
From the results, it can be seen that the recyclable lawn prepared by the second embodiment of the present invention has an appearance similar to that of the original fresh lawn after being recycled and drawn, and has breaking strength and elongation similar to those of the original fresh lawn, which indicates that the recyclable lawn prepared by the second embodiment of the present invention has a good recycling effect.
Claims (4)
1. A preparation method of a recyclable artificial lawn comprises grass fibers, a base fabric and an adhesive layer, wherein the base fabric is arranged below the grass fibers, and the adhesive layer is arranged below the base fabric; the preparation method of the recyclable artificial turf comprises the following steps:
the method is characterized in that:
(1) preparation of grass fiber: the components are respectively as follows according to parts by weight: 70-30 parts of linear low density polyethylene LLDPE, 30-70 parts of pigment and 0.5-5 parts of dispersing agent, mixing and uniformly stirring all the components in a two-roll plasticator, then heating to 130-190 ℃, and granulating by using an extrusion granulator, wherein the particle diameter is 3-6 mm master batch; and then the following components are taken according to parts by weight: 60-80 parts of linear low-density polyethylene LLDPE, 10-15 parts of homopolymerized PP polypropylene resin, 3-6 parts of lubricant stearic acid, 1-2 parts of anti-aging agent and 0.5-2 parts of master batch; mixing the raw materials, placing the mixture in a wire drawing device to obtain straight wires or curved wires, and arranging base cloth below the grass fibers;
(2) preparing a lawn gum raw material: the glue comprises the following components in parts by weight: 95-100 parts of aqueous polyolefin dispersion, 0.5-1 part of thickening agent, 1-5 parts of deionized water and 2-3 parts of pigment and filler, wherein the components are weighed respectively according to the parts by weight and then uniformly mixed, and then the viscosity of the glue is adjusted to 400-1000 mPa & s;
(3) conveying: before coating the base fabric with the sizing material, conveying the lawn to a sizing material groove through a conveyor, wherein the conveying speed of the lawn is 1.7-3 m/min;
(4) coating for the first time: a coating roller is arranged in the glue tank, an extrusion roller is arranged above the coating roller, the lawn passes through the coating roller and the extrusion roller, the coating roller rotates anticlockwise, the linear velocity of a roller wheel of the coating roller is consistent with the linear velocity of the back of the lawn in magnitude and direction, and the glue spreading amount of the lawn is 0.3-0.8 kg/m2A rear extrusion roller is arranged behind the coating roller;
(5) coating and baking for the first time: putting the coated lawn into a drying tunnel for baking at the temperature of 70-110 ℃ for 4-7 min;
(6) and (3) second coating: spraying the water-based polyolefin dispersion on the surface of the lawn which is coated and baked once by a spray gun, wherein the spraying amount of the water-based polyolefin dispersion is 0.01-0.3 kg/m2；
(7) And (3) coating and baking for the second time: conveying the lawn coated for the second time into a drying tunnel for baking, wherein the baking temperature is 70-110 ℃, and the baking time is 2-3.5 min;
(8) punching and cutting: in order to ensure the water permeability of the lawn, punching a plurality of water seepage holes on the back surface of the lawn, wherein the diameter of each water seepage hole is 2-5 mm, and cutting the lawn into rolls after the holes are punched;
the thickening agent in the step (2) is hydroxyethyl cellulose, acrylic acid or polyurethane;
the pigment and filler in the step (2) is calcium carbonate, titanium dioxide, carbon black or barium sulfate;
the air pressure of the extrusion roller is set to be 0.5-2 kg/cm2。
2. A method of manufacturing a recyclable artificial lawn as claimed in claim 1, characterized in that: the coating roller is 3-5 cm below the liquid level of the glue storage tank.
3. A method of manufacturing a recyclable artificial lawn as claimed in claim 1, characterized in that: the length of the drying tunnel is 6-10 meters.
4. A method of manufacturing a recyclable artificial lawn as claimed in claim 1, characterized in that: the rotation direction of the rear extrusion roll is opposite to that of the coating roll.
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| CN113614308B (en) * | 2019-03-20 | 2023-07-25 | R·努斯卡 | Method and apparatus for treating plant material to be used as infill material for synthetic and/or natural turf |
| CN112280496A (en) * | 2020-10-21 | 2021-01-29 | 江苏共创人造草坪股份有限公司 | Water-based thermoplastic adhesive and application thereof in artificial turf |
| CN115094704A (en) * | 2022-06-23 | 2022-09-23 | 江苏纵横优仪人造草坪有限公司 | Environment-friendly recyclable artificial lawn |
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