CN109943910A - A kind of wear-resisting artificial lawn filament and preparation method thereof - Google Patents
A kind of wear-resisting artificial lawn filament and preparation method thereof Download PDFInfo
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- CN109943910A CN109943910A CN201910179140.2A CN201910179140A CN109943910A CN 109943910 A CN109943910 A CN 109943910A CN 201910179140 A CN201910179140 A CN 201910179140A CN 109943910 A CN109943910 A CN 109943910A
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Abstract
The invention discloses a kind of wear-resisting artificial lawn filaments, its formula composition is prepared by following parts by weight: 60-80 parts of polyvinyl resin, 3-10 parts of epoxy resin, and 5-15 parts of polyolefin elastomer (POE), 1-5 parts of anti ultraviolet agent, 1-5 parts of silicone master batch, 1-5 parts of Masterbatch, 1-5 parts of polyacrylate, 0.5-5 parts of porous silica, 5-10 parts of magnetic powder dispersion liquid, 1-3 parts of antioxidant, 0.1-1 parts of erucyl amide.The preparation process of lawn silk of the invention is simple, by by the preparatory homogenous disperse of magnetic powder in dispersing aid thus magnetic powder can be completely dispersed and be sufficiently mixed uniformly in each raw material mixed melting process of lawn silk and other raw materials.Artificial lawn filament wearability of the invention is good, advantage of lower cost.
Description
Technical field
The present invention relates to the production and processing technical fields of chinampa, and in particular to a kind of wear-resisting artificial lawn filament and its system
Preparation Method.
Background technique
Chinampa rises in the U.S. of the sixties in last century earliest, using polyethylene, nylon etc. as primary raw material system
It is standby, because also not needing using fertilizer and irrigating etc. without nourishment especially, it is able to satisfy for a long time
High-intensitive movement need, thus, chinampa is widely used in the multinomial sports such as football, tennis, golf
In.
Chinampa is followed successively by basal layer, buffer layer and divot from top to bottom.Basal layer is by compacting soil layer, metalling
It is formed with pitch or concrete layer, basal layer has good drainage performance.Buffer layer is usually rubber or foamed plastics composition.
Divot is chinampa and the position of direct body contact, thus divot had not only required soft but also required turf with enough
Intensity, non-lodging, and should have good wear-resisting property and resistance to light.Synthetic turf is artificial lawn filament, is utilized
Adhesive is adhered to buffer layer.
Currently, most widely used base-material is still polyvinyl resin in the production of domestic artificial lawn filament, and pass through
Metallocene is added to increase the wear-resisting property of lawn silk, but there are still following problems for domestic existing lawn silk: metallocene
Higher cost, so that the production cost of artificial lawn filament is higher;The lawn silk produced using polyvinyl resin as base-material
Be easy to that electrostatic adhesion phenomenon occurs, affect the usage experience on lawn, thus generally require individually to add antistatic agent to prevent
The generation of electrostatic, still, the compatibility of antistatic agent and polyethylene base-material are poor, affect antistatic effect;Existing people
Lawn silk is made in order to increase its wear-resisting property and often add anti-wear agent or addition cement etc. as reinforcing rib, but this again can shadow
The pliability to lawn silk is rung, is easy to scratch human skin.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides it is a kind of do not need using metallocene and moderate cost it is wear-resisting
Artificial lawn filament, the lawn silk includes following components according to parts by weight: 60-80 parts of polyvinyl resin, epoxy resin 3-10
Part, 5-15 parts of polyolefin elastomer, 1-5 parts of anti ultraviolet agent, 1-5 parts of silicone master batch, Masterbatch 1-5 powder, polyacrylate 1-5
Part, 5-10 parts of magnetic powder dispersion liquid, 1-3 parts of antioxidant, 0.1-1 parts of erucyl amide, the anti ultraviolet agent is hindered amine light stabilizer.
Lawn silk of the invention is compounded by adding polyolefin elastomer with polyvinyl resin and epoxy resin, so that lawn silk is wear-resisting
Performance obviously increases, and the wear-resisting experiment of LISPORT, which can reach 50,000 turns or more, will not occur jag phenomenon, the magnetic powder with middle addition point
Dispersion liquid can enhance lawn silk wear-resisting property, furthermore to prevent finished product lawn silk between since the phenomenon that electrostatic adhesion, is changed
It is kind.
Further, the magnetic powder dispersion liquid includes magnetic powder and dispersing aid, and the magnetic powder occupies the magnetic powder dispersion liquid
Adding proportion be 5-20%.
Further, the magnetic powder is homopolarity magnetic powder, and the partial size of the magnetic powder is 10-550 μm, the magnetic energy of the magnetic powder
Product is not less than 20KJ/m3。
Further, the dispersing aid of wear-resisting artificial lawn filament of the invention be polyethylene glycol acrylate, poly- two
At least one of methylsiloxane and stearate.
Further, the magnetic powder dispersion liquid of wear-resisting artificial lawn filament of the invention is prepared in accordance with the following steps:
(1) after dispersing aid being heated to transparent no insoluble matter, heat preservation;
(2) homogeneous is opened, magnetic powder is added, homogeneous is uniform to system;
(3) it is persistently kept the temperature after vacuumizing removing bubble, and keeps stirring at low speed, it is spare.
Further, the antioxidant of wear-resisting artificial lawn filament of the invention is selected from BHT, antioxidant 1010, antioxidant
At least one of 1076 and irgasfos 168.
Further, wear-resisting artificial lawn filament of the invention further includes silica, and the porous silica is described
Parts by weight in wear-resisting artificial lawn filament are 0.5-5 parts, and the partial size of the porous silica is 20-100 microns.Of the invention
Make lawn silk slimmer and more graceful fluffy by adding porous silica in the silk of lawn, using effect is more preferably.According to FIFA Test
The vertical deformation of the lawn silk of the invention of the method measurement of Method 15 is no more than 8mm.
Further, the preparation method of wear-resisting artificial lawn filament of the invention includes the following steps:
(1) by polyvinyl resin, epoxy resin, polyolefin elastomer, anti ultraviolet agent, silicone master batch, Masterbatch, poly- third
Olefin(e) acid ester, porous silica, antioxidant and erucyl amide are uniform in stirrer for mixing;
(2) mixture of step (1) is discharged into addition magnetic powder dispersion liquid after single screw rod is melted, squeezed out, extrusion temperature
It is 220-240 DEG C;
(3) embryo silk is squeezed out by spinneret;
(4) it is cooling to enter cooling water tank;
(5) into boiler drawing-off;
(6) sizing of boiler retraction, winding, twisting.
Further, spinneret in the step (3) of the preparation method of wear-resisting artificial lawn filament of the invention
The cross section of extrusion cavities is diamond shape.
Wear-resisting artificial lawn filament of the invention has the beneficial effect that:
1. the lawn silk invented, which can reach 50,000 turns or more through the wear-resisting experiment of LISPORT in guarantee wear-resisting property, to be occurred
Jag phenomenon does not also add anti-wear agent specially, so that formulation cost is substantially reduced and is formulated since metallocene is not used in formula
Good compatibility;
2. being added to the magnetic powder of same polarity in the formula of lawn silk of the invention, it is thus possible to effectively solve finished product lawn silk
Between due to electrostatic the problem of adhesion, in addition, magnetic powder can also play wear-resisting performance to a certain extent.
3. adding porous silica in lawn silk of the invention, while increasing the wear-resisting property of lawn silk, make
Lawn silk density is lower, and lawn silk is effectively prevent not fluffy phenomenon occur.
4. the preparation process of lawn silk of the invention is simple, by the preparatory homogenous disperse of magnetic powder in dispersing aid thus can be by magnetic
Powder is completely dispersed and is sufficiently mixed uniformly in each raw material mixed melting process of lawn silk and other raw materials.
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementation
Example is only a part of the embodiments of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is common
Technical staff's all other embodiment obtained without making creative work belongs to the model that the present invention protects
It encloses.
Magnetic powder used in the present invention is homopolarity magnetic powder, and the partial size of magnetic powder is 10-550 microns, and magnetic energy product is not less than
20KJ/m3.The partial size of porous silica in the present invention is 20-100 microns.
Embodiment 1
The formula composition of the wear-resisting artificial lawn filament of this implementation is prepared by following parts by weight: 60 parts of polyvinyl resin,
5 parts of epoxy resin, 5 parts of polyolefin elastomer (POE), 3 parts of anti-UV944,2 parts of silicone master batch (MB50-002), Masterbatch 1
Part, 1 part of polyacrylate, 0.5 part of porous silica, (wherein magnetic powder is 0.25 part to 5 parts of magnetic powder dispersion liquid, polyethylene glycol third
4.75 parts of olefin(e) acid ester), 1 part of BHT, 0.1 part of erucyl amide.
Magnetic powder dispersion liquid of the invention is prepared in accordance with the following steps:
(1) after polyethylene glycol acrylate being heated to transparent no insoluble matter, heat preservation;
(2) 1000rpm homogeneous is opened, magnetic powder is added, homogeneous 5-10 minutes uniform to system;
(3) it is persistently kept the temperature after vacuumizing removing bubble, and 10-20rpm is kept to stir, it is spare to prevent magnetic powder from settling.
The preparation method of the wear-resisting artificial lawn filament of wear-resisting artificial lawn filament of the invention includes the following steps:
(1) by polyvinyl resin, epoxy resin, POE, anti-UV944, MB50-002, Masterbatch, polyacrylate, porous
Silica, BHT and erucyl amide are uniform in stirrer for mixing;
(2) mixture of step (1) is discharged into addition magnetic powder dispersion liquid after single screw rod is melted, squeezed out, extruder is each
Duan Wendu is 220 DEG C, 220 DEG C, 230 DEG C and 240 DEG C;
(3) embryo silk is squeezed out by spinneret, the cross section of the extrusion of spinneret is diamond shape;
(4) it is cooling to enter cooling water tank;
(5) into boiler drawing-off;
(6) sizing of boiler retraction, winding, twisting.
The performance measurement method for the lawn silk that the present embodiment is prepared are as follows: be bonded in the lawn silk of the present embodiment
After on the lawn basal layer and buffer layer of 0.6m*2.0m, performance measurement is carried out using LISPORT tester, measurement result is grass
The vertical deformation of level ground silk is 8mm, and the revolving speed of the resistible maximum wear-resisting test of wear-resisting property is 50500 turns without jag phenomenon, line
Property friction 3g.
Embodiment 2
The formula composition of the wear-resisting artificial lawn filament of this implementation is prepared by following parts by weight: 70 parts of polyvinyl resin,
3 parts of epoxy resin, 10 parts of polyolefin elastomer (POE), 4 parts of anti-UV944,2 parts of porous silica, silicone master batch
(MB50-002) 4 parts, 3 powder of Masterbatch, 2 parts of polyacrylate, (wherein magnetic powder is 1.5 parts to 10 parts of magnetic powder dispersion liquid, poly dimethyl
8.5 parts of siloxanes), 1 part of antioxidant 1010,1 part of antioxidant 1076,0.3 part of erucyl amide.The magnetic powder dispersion liquid of the present embodiment
Preparation method and lawn silk preparation method and lawn silk method for testing performance referring to embodiment 1 carry out.Measurement result
Vertical deformation for lawn silk is 6mm, and the revolving speed of the resistible maximum wear-resisting test of wear-resisting property is existing without jag when being 54000 turns
As linear friction 5g.
Embodiment 3
The formula composition of the wear-resisting artificial lawn filament of this implementation is prepared by following parts by weight: 80 parts of polyvinyl resin,
8 parts of epoxy resin, 15 parts of polyolefin elastomer (POE), 1 part of anti-UV944,4 parts of porous silica, silicone master batch
(MB50-002) 5 parts, 5 powder of Masterbatch, 4 parts of polyacrylate, (wherein magnetic powder is 1.3 parts to 7.8 parts of magnetic powder dispersion liquid, stearic acid
6.5 parts of ester), 2 parts of antioxidant 1076,0.6 part of erucyl amide.The preparation method of the magnetic powder dispersion liquid of the present embodiment and lawn silk
Preparation method and lawn silk method for testing performance referring to embodiment 1 carry out.Measurement result is the vertical deformation of lawn silk
Without jag phenomenon, linear friction 6g when revolving speed for 7mm, the resistible maximum wear-resisting test of wear-resisting property is 62000 turns.
Embodiment 4
The formula composition of the wear-resisting artificial lawn filament of this implementation is prepared by following parts by weight: 65 parts of polyvinyl resin,
10 parts of epoxy resin, 12 parts of polyolefin elastomer (POE), 5 parts of anti-UV944,5 parts of porous silica, silicone master batch
(MB50-002) 1 part, 3 powder of Masterbatch, 5 parts of polyacrylate, (wherein magnetic powder is 0.5 part to 5.5 parts of magnetic powder dispersion liquid, stearic acid
5 parts of ester), 1 part of antioxidant 1010,2 parts of irgasfos 168,1 part of erucyl amide.The preparation side of the magnetic powder dispersion liquid of the present embodiment
The method for testing performance of the preparation method and lawn silk of method and lawn silk is carried out referring to embodiment 1.Measurement result is lawn silk
Vertical deformation be 7mm, without jag phenomenon when the revolving speed of the resistible maximum wear-resisting test of wear-resisting property is 59000 turns, linearly
Rub 4g.
The technical concepts and features of embodiment of above only to illustrate the invention, its object is to allow be familiar with technique
People understands the contents of the present invention and is implemented, and it is not intended to limit the scope of the present invention, all spiritual according to the present invention
The equivalent change or modification that essence is done, should be covered by the scope of protection of the present invention.
Claims (9)
1. a kind of wear-resisting artificial lawn filament, which is characterized in that the lawn silk includes following component: polyethylene according to parts by weight
60-80 parts of resin, 3-10 parts of epoxy resin, 5-15 parts of polyolefin elastomer, 1-5 parts of anti ultraviolet agent, 1-5 parts of silicone master batch,
Masterbatch 1-5 powder, it is 1-5 parts of polyacrylate, 5-10 parts of magnetic powder dispersion liquid, 1-3 parts of antioxidant, 0.1-1 parts of erucyl amide, described
Anti ultraviolet agent is hindered amine light stabilizer.
2. wear-resisting artificial lawn filament according to claim 1, which is characterized in that the magnetic powder dispersion liquid includes magnetic powder and divides
Auxiliary agent is dissipated, the adding proportion that the magnetic powder occupies the magnetic powder dispersion liquid is 5-20%.
3. wear-resisting artificial lawn filament according to claim 2, which is characterized in that the magnetic powder is homopolarity magnetic powder, the magnetic
The partial size of powder is 10-550 μm, and the magnetic energy product of the magnetic powder is not less than 20KJ/m3。
4. wear-resisting artificial lawn filament according to claim 2, which is characterized in that the dispersing aid is polyethylene glycol propylene
Acid esters, at least one of dimethyl silicone polymer and stearate.
5. wear-resisting artificial lawn filament according to claim 2, which is characterized in that the magnetic powder dispersion liquid is in accordance with the following steps
It is prepared:
(1) after dispersing aid being heated to transparent no insoluble matter, heat preservation;
(2) homogeneous is opened, magnetic powder is added, homogeneous is uniform to system;
(3) it is persistently kept the temperature after vacuumizing removing bubble, and keeps stirring at low speed, it is spare.
6. wear-resisting artificial lawn filament according to claim 1, which is characterized in that the antioxidant is selected from BHT, antioxidant
1010, at least one of antioxidant 1076 and irgasfos 168.
7. wear-resisting artificial lawn filament according to claim 1 to 6, which is characterized in that further include porous silica
Silicon, parts by weight of the porous silica in the wear-resisting artificial lawn filament are 0.5-5 parts, the porous silica
Partial size is 20-100 microns.
8. the preparation method of wear-resisting artificial lawn filament according to claim 7, which comprises the steps of:
(1) by polyvinyl resin, epoxy resin, polyolefin elastomer, anti ultraviolet agent, silicone master batch, Masterbatch, polyacrylic acid
Ester, porous silica, antioxidant and erucyl amide are uniform in stirrer for mixing;
(2) mixture of step (1) is discharged into addition magnetic powder dispersion liquid after single screw rod is melted, squeezed out, extrusion temperature is
220-240℃;
(3) embryo silk is squeezed out by spinneret;
(4) it is cooling to enter cooling water tank;
(5) into boiler drawing-off;
(6) sizing of boiler retraction, winding, twisting.
9. the preparation method of wear-resisting artificial lawn filament according to claim 8, which is characterized in that in the step (3)
The cross section of the extrusion cavities of spinneret is diamond shape.
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112779838A (en) * | 2020-07-13 | 2021-05-11 | 张家港市金立纳米高弹材料有限公司 | Artificial lawn manufacturing process and method |
CN113417028A (en) * | 2021-04-29 | 2021-09-21 | 淮安腾达色母有限公司 | Wear-resistant artificial lawn thread and preparation method thereof |
CN117431661A (en) * | 2023-11-02 | 2024-01-23 | 河北赛恩塑业有限公司 | Suspension type spliced lawn |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1246498A (en) * | 1998-08-29 | 2000-03-08 | 温州市龙湾化纤厂 | Magnetic monofilament yarn of polyester |
CN1526873A (en) * | 2003-09-23 | 2004-09-08 | 天津工业大学 | Magnetic fiber and its making process |
CN101476174A (en) * | 2009-01-20 | 2009-07-08 | 江苏共创人造草坪有限公司 | Enhanced artificial lawn fibre and preparation thereof |
CN102493011A (en) * | 2011-11-14 | 2012-06-13 | 泰山体育产业集团有限公司 | Wear-resistant artificial turf fiber |
CN102535308A (en) * | 2011-12-27 | 2012-07-04 | 江苏共创人造草坪有限公司 | Antistatic artificial lawn and preparation method thereof |
CN105017634A (en) * | 2015-08-12 | 2015-11-04 | 宜兴市联创塑业有限公司 | Flexible, abrasion-resisting artificial ribbed lawn filaments and preparing method thereof |
CN105568425A (en) * | 2016-03-09 | 2016-05-11 | 江苏共创人造草坪有限公司 | Wear-resistant and temperature-resistant artificial turf and preparation method thereof |
CN106832536A (en) * | 2016-09-23 | 2017-06-13 | 泰山体育产业集团有限公司 | One kind leisure landscape chinampa and preparation method thereof |
CN107142553A (en) * | 2017-07-03 | 2017-09-08 | 成都磁动势科技有限公司 | The method for preparing magnetic fibre |
-
2019
- 2019-03-11 CN CN201910179140.2A patent/CN109943910A/en active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1246498A (en) * | 1998-08-29 | 2000-03-08 | 温州市龙湾化纤厂 | Magnetic monofilament yarn of polyester |
CN1526873A (en) * | 2003-09-23 | 2004-09-08 | 天津工业大学 | Magnetic fiber and its making process |
CN101476174A (en) * | 2009-01-20 | 2009-07-08 | 江苏共创人造草坪有限公司 | Enhanced artificial lawn fibre and preparation thereof |
CN102493011A (en) * | 2011-11-14 | 2012-06-13 | 泰山体育产业集团有限公司 | Wear-resistant artificial turf fiber |
CN102535308A (en) * | 2011-12-27 | 2012-07-04 | 江苏共创人造草坪有限公司 | Antistatic artificial lawn and preparation method thereof |
CN105017634A (en) * | 2015-08-12 | 2015-11-04 | 宜兴市联创塑业有限公司 | Flexible, abrasion-resisting artificial ribbed lawn filaments and preparing method thereof |
CN105568425A (en) * | 2016-03-09 | 2016-05-11 | 江苏共创人造草坪有限公司 | Wear-resistant and temperature-resistant artificial turf and preparation method thereof |
CN106832536A (en) * | 2016-09-23 | 2017-06-13 | 泰山体育产业集团有限公司 | One kind leisure landscape chinampa and preparation method thereof |
CN107142553A (en) * | 2017-07-03 | 2017-09-08 | 成都磁动势科技有限公司 | The method for preparing magnetic fibre |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112779838A (en) * | 2020-07-13 | 2021-05-11 | 张家港市金立纳米高弹材料有限公司 | Artificial lawn manufacturing process and method |
CN112779838B (en) * | 2020-07-13 | 2022-07-08 | 张家港市金立纳米高弹材料有限公司 | Artificial lawn manufacturing process and method |
CN113417028A (en) * | 2021-04-29 | 2021-09-21 | 淮安腾达色母有限公司 | Wear-resistant artificial lawn thread and preparation method thereof |
CN117431661A (en) * | 2023-11-02 | 2024-01-23 | 河北赛恩塑业有限公司 | Suspension type spliced lawn |
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