CN103432822B - Coal washing monofilament filter cloth and preparation method thereof - Google Patents
Coal washing monofilament filter cloth and preparation method thereof Download PDFInfo
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- CN103432822B CN103432822B CN201310406701.0A CN201310406701A CN103432822B CN 103432822 B CN103432822 B CN 103432822B CN 201310406701 A CN201310406701 A CN 201310406701A CN 103432822 B CN103432822 B CN 103432822B
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Abstract
The present invention relates to filtering material field, particularly coal washing monofilament filter cloth and preparation method thereof.This monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%.Its preparation method, comprises extruding and obtains spun filament, and the front end heating-up temperature of extruder used when extruding is 160-164 DEG C, middle-end heating-up temperature is 255-260 DEG C, rear end heating-up temperature is 255-275 DEG C, and die head heating-up temperature is 260-280 DEG C, and extruded velocity is 17-19m/min.Compared with the monofilament filter cloth in correlation technique, ultimate strength is significantly improved, can not the production efficiency of braking effect loom in the woven process of monofilament, improves production efficiency, adds economic benefit; Meanwhile, prolongation is obtained the service life of filter cloth; In addition, outside perception have also been obtained raising, improves the competitiveness of product.
Description
Technical field
The present invention relates to filtering material field, in particular to the special monofilament filter cloth of a kind of coal washing and production method thereof.
Background technology
In coal washing process, when carrying out Separation of Solid and Liquid with vacuum filter, centrifuge, band filter or plate and frame filter etc. to suspension, mostly adopt filter cloth as filter medium.Wherein, monofilament filter cloth is weaved by single synthetic fibers, has intensity large, not easily block, not broken yarn, stability is high, not yielding, uniform pore diameter, smooth surface, and filter cake is easily peeled off, filter cloth easy cleaning, easily, the advantages such as the life-span is long, development in recent years is rapid in regeneration.
In correlation technique, coal washing monofilament filter cloth generally adopts polypropylene material, by batching, extrudes, cooling, hot gas spring, water suction, and oiling rolling, sub-wire, warping, weaves, and the technique of calendering is prepared from.
But, because the strength of filament of polypropylene material is low, in the process of weaving cotton cloth utilizing monofilament, easily there is single wire fracture, causing loom defects, greatly reduce the production efficiency of loom, and then reduce production efficiency, add production cost.
Summary of the invention
The object of the present invention is to provide special monofilament filter cloth of a kind of coal washing and preparation method thereof, to solve the above problems.
Provide a kind of coal washing monofilament filter cloth in an embodiment of the present invention, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%.
Additionally provide another coal washing monofilament filter cloth in embodiments of the invention, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%, delustering agent 0.2-2%.
Additionally provide the third coal washing monofilament filter cloth in embodiments of the invention, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%, the dark green 0.2-2% of titanium.
The embodiment of the present invention additionally provides the production method of the coal washing monofilament filter cloth in a kind of above-described embodiment, comprise: extrusion step, obtain spun filament, the front end heating-up temperature of the extruder that described extrusion step is used is 160-164 DEG C, middle-end heating-up temperature is 255-260 DEG C, rear end heating-up temperature is 255-275 DEG C, and die head heating-up temperature is 260-280 DEG C, and extruded velocity is 17-19m/min.
The special monofilament filter cloth of coal washing of the above embodiment of the present invention and production method thereof, by selecting above-mentioned raw materials and passing through aforesaid operations, the monofilament filter cloth of the high density polyethylene (HDPE) obtained and polypropylene blending, combine the advantage of high density polyethylene (HDPE) and polypropylene, avoid shortcoming during both each leisure making monofilament filter cloths, compared with the monofilament filter cloth in correlation technique, the monofilament filter cloth ultimate strength of high density polyethylene (HDPE) and polypropylene blending is significantly improved, thus can not the production efficiency of braking effect loom in the woven process of monofilament, improve production efficiency, add economic benefit,
Meanwhile, because the ultimate strength of filter cloth increases, the service life of filter cloth obtains prolongation; In addition, outside perception have also been obtained raising, improves the competitiveness of product.
Detailed description of the invention
Embodiments provide a kind of coal washing monofilament filter cloth, wherein, monofilament filter cloth can be obtained by the raw material of following part by weight:
One, high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%;
Two, high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%, the dark green 0.2-2% of titanium;
Three, high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%, delustering agent 0.2-2%.
The monofilament filter cloth that the embodiment of the present invention provides is in preparation process, the front end heating-up temperature extruding extruder used is 160-164 DEG C, and middle-end heating-up temperature is 255-260 DEG C, and rear end heating-up temperature is 255-275 DEG C, die head heating-up temperature is 260-280 DEG C, and extruded velocity is 17-19m/min.
In the present invention, by by high density polyethylene (HDPE), polypropylene, white oil is mixed with coal washing monofilament filter cloth, after batching in an extruder, to high density polyethylene (HDPE), the mixture of polypropylene and white oil carries out progressively high-temperature heating, high density polyethylene (HDPE) and polyacrylic temperature are raised gradually, molten condition is in gradually to when extruding the stage, and the rearrangement occurred between two quasi-molecules, white oil is as a kind of oil soluble material, when the polypropylene generation intermolecular rearrangement of the high density polyethylene (HDPE) of molten state and molten state, molecular structure after high density polyethylene (HDPE) and polypropylene are reset is more firm, obtain the monofilament filter cloth of high density polyethylene (HDPE) and polypropylene blending.
When also comprising titanium viridescent organic dyestuff in raw material, the monofilament filter cloth obtaining high density polyethylene (HDPE) and polypropylene blending presents green.In addition, can be used for, except the preparation of the monofilament filter cloth of high density polyethylene (HDPE) and polypropylene blending, the organic dyestuff of other any one colors can also being selected as organic dyestuff except titanium is dark green.
When also comprising delustering agent in raw material, the monofilament filter cloth obtaining high density polyethylene (HDPE) and polypropylene blending can improve the optical reflection performance on monofilament filter cloth surface, reduces the transparency of monofilament filter cloth, increases the whiteness of monofilament filter cloth.
Because high density polyethylene (HDPE) non-refractory, therefore, the temperature heated in an extruder can not be too high, but, can not be too low, because polyacrylic fusing point is high, temperature is low polypropylene can not melting, therefore, in the present invention, the front end heating-up temperature extruding extruder used is 160-164 DEG C, middle-end heating-up temperature is 255-260 DEG C, rear end heating-up temperature is 255-275 DEG C, die head heating-up temperature is 260-280 DEG C, polypropylene and high density polyethylene (HDPE) is made to can be good at melting, also high density polyethylene (HDPE) transition melting can not be made to form liquid simultaneously, operation is extruded in impact.In addition, when extruded velocity is 17-19m/min, the spun filament even thickness obtained and powerful high.
The present invention is by selecting above-mentioned raw materials and passing through aforesaid operations, the monofilament filter cloth of the high density polyethylene (HDPE) obtained and polypropylene blending, combine the advantage of high density polyethylene (HDPE) and polypropylene, avoid shortcoming during both each leisure making monofilament filter cloths, compared with the monofilament filter cloth in correlation technique, the monofilament filter cloth ultimate strength of high density polyethylene (HDPE) and polypropylene blending is significantly improved, thus can not the production efficiency of braking effect loom in the woven process of monofilament, improve production efficiency, add economic benefit; Meanwhile, because the ultimate strength of filter cloth increases, the service life of filter cloth obtains prolongation; In addition, outside perception have also been obtained raising, improves the competitiveness of product.
Further, spun filament cooling and shaping temperature is 35-46 DEG C, and the stroke of spun filament is 50-55cm.In the embodiment of the present invention, the cooling and shaping of spun filament is using water as medium, and temperature is too low, easily causes spun filament to cool rapidly, can reduce cooling effect, makes powerful reduction, if temperature is too high, well can not realize the effect of cooling and shaping.The stroke of spun filament also can have influence on the effect of cooling and shaping.
Further, described hot gas spring comprises hot gas spring 1 and hot gas spring 2, and the temperature of described hot gas spring 1 is 95-97 DEG C, and draw ratio is 4.18-4.58, and the temperature of described hot gas spring 2 is 98-99 DEG C, and draw ratio is 7.51-10.21.In the embodiment of the present invention, adopt twice drawing-off, different from single drawing-off.Adopt hot water as drawing-off medium, at a higher temperature, can make high density polyethylene (HDPE) and polyacrylic mixture is easier in drafting process, intermolecular rearrangement occurs, therefore, the present invention, when adopting hot water as medium, adopts high-temperature water.Adopt the mode of twice drawing-off, compared with single drawing-off, the first drawing-off of twice drawing-off can adopt less draw ratio, avoids the process of resetting between saboteur simultaneously, makes the silk that obtains powerful low.
Further, described calendering adopts drum-type calender, and its calendering temperature 150-180 DEG C, drum rotation speed is 5-10m/min.Under this condition, the monofilament filter cloth surfacing obtained, presentation quality is high.
The monofilament filter cloth that the embodiment of the present invention provides specifically can be prepared as follows:
Step one, takes raw material, mixes and stirs.
Step 2, compound step one obtained is poured in screw extruder feed bin, make its at high temperature melting, wherein extruder front end heating-up temperature is 160-164 DEG C, middle-end heating-up temperature is 255-260 DEG C, rear end heating-up temperature is 255-275 DEG C, and die head heating-up temperature is 260-280 DEG C, and extruded velocity is 17-19m/min.Obtain spun filament.
Step 3, cools spun filament in 35-45 DEG C of cold rinse bank, and wherein, the stroke of spun filament in cold rinse bank is 55cm.
Step 4, the spun filament adopting five (rubber cylinder) drafting machines step 3 to be cooled carries out twice drawing-off, regulates drafting machine revolution to be 83-173.63m/min.First in the hot water storgae of 96 DEG C, carry out hot gas spring 1, draw ratio is 4.18-4.58, then in 98 DEG C of hot water storgaes, carries out hot gas spring 2, and draw ratio is: 7.51-10.21.
Step 5, according to the conventional method of this area, utilizes the spun filament absorbent drying after absorption fan for water counter extensioin.Use high speed absorption fan for water, connect 2 water-absorbing cylinders and at the upper and lower two side faces of monofilament, it is absorbed water.Both can have been made to spun filament cooling and shaping by absorbent drying, ensure strength of filament; Can moisture be removed again, prepare for monofilament below adds spinning oil.
Step 6, according to the conventional method of this area, connects coiled body by dried spun filament, and the rolling of instillation spinning oil, obtains monofilament axle;
Step 7, according to the conventional method of this area, is placed on spun filament in devillicate machine and is divided into 64 monofilament.
Step 8, according to the conventional method of this area, is rolled onto monofilament on loom shaft with sectional warper.
Step 9, weave cotton cloth with increasing the weight of oar rapier loom, weavy grain adopts five piece three (satin), lower machine through close 491/10cm, filling density 139/10cm.
Step 10, adopt the calendering of drum-type calender to monofilament filter cloth, wherein, temperature is 170 DEG C, and speed is 10 ms/min.
Below by specific embodiment, the present invention is described in further detail.
The monofilament filter cloth of the high density polyethylene (HDPE) that the embodiment of the present invention provides and polypropylene blending, according to the regulation of GB/T3923.1-1997 textile fabric tensile property, tests the ultimate strength of the monofilament filter cloth that embodiment 1-12 and comparative example provide.
The material of the coal washing monofilament filter cloth that embodiment 1-4 provides, weight and ultimate strength are as shown in table 1.
The material of the coal washing monofilament filter cloth that table 1 embodiment 1-4 provides, weight and ultimate strength
The preparation process executing the monofilament filter cloth that routine 1-4 provides is described above, and just process conditions are different, and the process conditions that embodiment 1-4 prepares monofilament filter cloth are as shown in table 2.
Table 2 embodiment 1-4 prepares the process conditions of monofilament filter cloth
The strength of filament of the high density polyethylene (HDPE) that embodiment 1-4 provides and polypropylene blending can reach 59-63cN/tex, the situation of single wire fracture is there will not be when utilizing it to weave cotton cloth, loom can be produced smoothly, compared with weaving cotton cloth with use polypropylene material monofilament, the production efficiency of loom improves greatly, reduces production cost.
The material of the coal washing monofilament filter cloth that embodiment 5-8 provides, weight and ultimate strength are as shown in table 3.
The material of the coal washing monofilament filter cloth that table 3 embodiment 5-8 provides, weight and ultimate strength
The preparation process executing the monofilament filter cloth that routine 5-8 provides is described above, and just process conditions are different, and the process conditions that embodiment 5-8 prepares monofilament filter cloth are as shown in table 4.
Table 4 embodiment 5-8 prepares the process conditions of monofilament filter cloth
The strength of filament of the high density polyethylene (HDPE) that embodiment 5-8 provides and polypropylene blending can reach 60-63cN/tex, the situation of single wire fracture is there will not be when utilizing it to weave cotton cloth, loom can be produced smoothly, compared with weaving cotton cloth with use polypropylene material monofilament, the production efficiency of loom improves greatly, reduces production cost; Meanwhile, monofilament filter cloth is green, makes the surperficial perception of filter cloth better, more can attract consumer.
The material of the coal washing monofilament filter cloth that embodiment 9-12 provides, weight and ultimate strength are as shown in table 5.
The material of the coal washing monofilament filter cloth that table 5 embodiment 9-12 provides, weight and ultimate strength
The preparation process executing the monofilament filter cloth that routine 9-12 provides is described above, and just process conditions are different, and the process conditions that embodiment 9-12 prepares monofilament filter cloth are as shown in table 6.
Table 6 embodiment 9-12 prepares the process conditions of monofilament filter cloth
The strength of filament of the high density polyethylene (HDPE) that embodiment 9-12 provides and polypropylene blending can reach 60-63cN/tex, the situation of single wire fracture is there will not be when utilizing it to weave cotton cloth, loom can be produced smoothly, compared with weaving cotton cloth with use polypropylene material monofilament, the production efficiency of loom improves greatly, reduces production cost; Meanwhile, in embodiment 9-12, the material that delustering agent can select titanium dioxide etc. to brighten.Delustering agent is produced monofilament filter cloth as one of raw material, the optical reflection performance on monofilament filter cloth surface can be improved, reduce the transparency of monofilament filter cloth, increase the whiteness of monofilament filter cloth.Make the presentation quality of the monofilament filter cloth of gained better, more can attract consumer.
Comparative example: a kind of polypropylene monofilament filter cloth, is made up of the material of following weight parts: polypropylene 100g.
The polypropylene monofilament filter cloth that comparative example provides is prepared according to the technological means of this area routine.
The detection method of the ultimate strength of polypropylene monofilament is with the detection method of embodiment 1-12.The ultimate strength of this comparative example polypropylene monofilament is: 50cN/tex.Because the strength of filament of polypropylene material is low, in the process of weaving cotton cloth utilizing it, easily there is single wire fracture, causing loom defects, thus reduce the production efficiency of loom, and then reduce production efficiency, increase production cost.
Compared with the polypropylene monofilament filter cloth provided with comparative example, the monofilament filter cloth ultimate strength of the high density polyethylene (HDPE) that embodiment of the present invention 1-12 provides and polypropylene blending significantly improves, the requirement of loom to strength of filament can be met, the situation occurring single wire fracture in the process of weaving cotton cloth can not be caused, thus improve the production efficiency of equipment, improve production efficiency, reduce production cost.
Wherein, in embodiment 1,6,10, molecular rearrangement effect is best in the molten state for high density polyethylene (HDPE) and polypropylene, give full play to high density polyethylene (HDPE) mechanical strength good, the feature that environmental stress crack resistance is good, feature resistant to elevated temperatures with polypropylene, compared with the monofilament filter cloth of polythene material, improve the hardness of filter cloth, surface is not easy to occur fold, compared with the monofilament filter cloth of polypropylene material, improve the ultimate strength of monofilament, loom is produced smoothly, improves the production efficiency of loom, improve economic benefit.And the monofilament filter cloth that embodiment 6 provides has color, in the embodiment of the present invention, due to high density polyethylene (HDPE) and polypropylene be blended in heated condition under there occurs intermolecular rearrangement, in the process of resetting, with fuel-bound, make the monofilament obtained have the color of fuel, thus improve the presentation quality of monofilament filter cloth, improve the competitiveness of product in market; In like manner, owing to adding delustering agent in the raw material of embodiment 10, therefore, the monofilament filter cloth obtained is whiter, and presentation quality is better, improves the competitiveness of product in market.
The monofilament filter cloth that embodiment of the present invention 1-12 and comparative example provide is used for the solid-liquid separation process in coal washing process, the automatic chamber-type press filter of separation equipment XMZ1250-U; Separation condition is: sealed normal temperature high voltage filters.Found that, under identical filter condition, technological requirement conveniently, method carry out conventional filter operation, the service life of the monofilament filter cloth of the high density polyethylene (HDPE) that embodiment of the present invention 1-12 provides and polypropylene blending is 1600-2000 hour, and the service life of the polypropylene monofilament filter cloth that comparative example provides is 1200 hours.Visible, under the prerequisite meeting filtering requirement, the high density polyethylene (HDPE) that the embodiment of the present invention provides and polypropylene blending monofilament filter cloth are than the long service life of polypropylene monofilament filter cloth.
The model of raw materials used in the embodiment of the present invention, equipment and originate as shown in table 7.
Raw materials used, equipment in table 7 embodiment 1-12 and comparative example
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a coal washing monofilament filter cloth, is characterized in that, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%.
2. coal washing monofilament filter cloth according to claim 1, is characterized in that, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 75%, polypropylene 24.5%, white oil 0.5%.
3. a coal washing monofilament filter cloth, is characterized in that, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%, the dark green 0.2-2% of titanium.
4. coal washing monofilament filter cloth according to claim 3, is characterized in that, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 70%, polypropylene 28.7%, white oil 0.8%, titanium viridescent 0.5%.
5. a coal washing monofilament filter cloth, is characterized in that, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 50-75%, polypropylene 24.5-48%, white oil 0.2-2%, delustering agent 0.2-2%.
6. coal washing monofilament filter cloth according to claim 5, is characterized in that, described monofilament filter cloth is obtained by the raw material of following part by weight: high density polyethylene (HDPE) 72%, polypropylene 36%, white oil 0.5%, delustering agent 1.5%.
7. the preparation method of the coal washing monofilament filter cloth described in any one of claim 1-6, comprise the step extruded and obtain spun filament, it is characterized in that, the described front end heating-up temperature obtaining spun filament step extruder used of extruding is 160-164 DEG C, middle-end heating-up temperature is 255-260 DEG C, rear end heating-up temperature is 255-275 DEG C, and die head heating-up temperature is 260-280 DEG C, and extruded velocity is 17-19m/min.
8. the preparation method of coal washing monofilament filter cloth according to claim 7, also comprises the step of cooling and shaping, it is characterized in that after extruding, and the temperature of described cooling and shaping is 35-46 DEG C, and the stroke of described spun filament is 50-55cm.
9. the preparation method of coal washing monofilament filter cloth according to claim 8, the step of hot gas spring is also comprised after cooling and shaping, it is characterized in that, described hot gas spring comprises hot gas spring 1 and hot gas spring 2, the temperature of described hot gas spring 1 is 95-97 DEG C, draw ratio is 4.18-4.58, and the temperature of described hot gas spring 2 is 98-99 DEG C, and draw ratio is 7.51-10.21.
10. the preparation method of coal washing monofilament filter cloth according to claim 9, also comprises the step of calendering, it is characterized in that after cooling and shaping, and described calendering adopts drum-type calender, and its calendering temperature 150-180 DEG C, drum rotation speed is 5-10m/min.
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| CN107297102B (en) * | 2017-06-29 | 2018-07-17 | 江苏灵氟隆环境工程有限公司 | A kind of preparation method of high-strength corrosion-resisting industrial filter cloth |
| CN107974754A (en) * | 2017-12-27 | 2018-05-01 | 安徽六顺创业特种滤材有限公司 | A kind of polytetrafluoroethylene fibre filter cloth and its production technology |
| CN109023647B (en) * | 2018-08-22 | 2020-11-10 | 安徽利思达网业有限公司 | Preparation method of wear-resistant monofilament filter cloth for filtering high-temperature liquid |
| CN109778334A (en) * | 2019-01-24 | 2019-05-21 | 鸡西市恒润滤布有限公司 | A kind of coal washing monofilament filter cloth and preparation method thereof |
| CN115874333A (en) * | 2022-07-20 | 2023-03-31 | 江苏三元环保科技有限公司 | Manufacturing process of dust removal filter material |
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| CN101994267A (en) * | 2009-08-10 | 2011-03-30 | 中国水产科学研究院东海水产研究所 | Method for processing small-specification blending modified polypropylene light-emitting rope for fishing |
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| DE102005038098B4 (en) * | 2005-08-10 | 2010-01-28 | BLüCHER GMBH | Adsorption filter material with improved tear strength and / or tear propagation resistance |
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| CN1711384A (en) * | 2002-11-13 | 2005-12-21 | 纳幕尔杜邦公司 | Multiple component meltblown webs |
| CN1986627A (en) * | 2005-12-22 | 2007-06-27 | 吴永刚 | Composite polypropylene material and its preparing method |
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