CN104492160B - Ultra-high molecular weight polyethylene monofilaments filter cloth and preparation method thereof - Google Patents
Ultra-high molecular weight polyethylene monofilaments filter cloth and preparation method thereof Download PDFInfo
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- CN104492160B CN104492160B CN201410771140.9A CN201410771140A CN104492160B CN 104492160 B CN104492160 B CN 104492160B CN 201410771140 A CN201410771140 A CN 201410771140A CN 104492160 B CN104492160 B CN 104492160B
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Abstract
The invention discloses a kind of ultra-high molecular weight polyethylene monofilaments filter cloth and preparation method thereof, its filter cloth is single layer structure or double-decker; The filter cloth of single layer structure form, its warp is made into by a monofilament, parallel is made into by another root monofilament, and filament diameter is 0.07-0.2mm; The filter cloth of double-decker form, the arrangement ratio of its table back warp and table back weft is 4:1, and access node method is binding pick method, and the warp of its table organization and inner tissue is made into by a monofilament respectively, parallel is made into by another root monofilament; The filament diameter of above-mentioned table organization is 0.07-0.2mm, tensile strength is more than 1100MPa; In the filament diameter of tissue be 0.6mm, tensile strength is more than 1000MPa.Above-mentioned monofilament all adopts melt spinning process to be spinned by ultra-high molecular weight polyethylene, forms successively after weaving cotton cloth through thermal finalization and calendering process.Filter cloth of the present invention has the advantages such as intensity is high, surface property good, long service life, and its preparation technology is simple, cost is low.
Description
Technical field
The present invention relates to a kind of industrial filter cloth and preparation method thereof, particularly relate to a kind of ultra-high molecular weight polyethylene monofilaments filter cloth and preparation method thereof.
Background technology
Filtration textile is the important branch of fabrics for industrial use, and its output is about about 10% of fabrics for industrial use.
At present, the filtering material used in fields such as metal ore dressing, sludge dewatering, the water pollutions comprehensive regulation, power plant desulfurization denitration, papermaking, fine chemistry industries is both at home and abroad based on polyamide fibre, terylene, polypropylene filament filter cloth.The industrial filter cloth of these materials in actual use, exist all more or less not wear-resisting, surface crystallization seriously, easily hardens, the high sticky defects such as material is not easily peeled off, regenerability is poor, service life is short have a strong impact on filter effect in production process.
Such as, in field, mine, ion concentration because solid particle is more and more thinner, in water is more and more higher, the crystallisation problems of filter cloth surface is more and more serious, cause that the filtration resistance of filter cloth is large, filter cake is incrust, the replacement cycle of filter cloth is shorter and shorter, even need to change for one day one, both had a strong impact on production efficiency, cause again the significantly rising of production cost.
The intensity that ultra-high molecular weight polyethylene has due to self is high, surface property good, strong alkali-acid resistance, wearability are good, toughness and fatigue performance is good, long service life, foreign matter be difficult to attachment, and be easy to the various advantageous characteristic such as regeneration, meet the property indices requirement of high-performance filter cloth.
But how to spin out and be suitable for that number needs weaved by high-performance filter cloth, that diameter is within the scope of 0.07-0.2mm ultra-high molecular weight polyethylene silk thread, and develop and be suitable for ultra-high molecular weight polyethylene silk thread weaving, become the technical problem that prior art is urgently to be resolved hurrily.
Summary of the invention
An object of the present invention is, provides a kind of ultra-high molecular weight polyethylene monofilaments filter cloth.
A kind of technical scheme that the present invention is adopted for achieving the above object is, a kind of ultra-high molecular weight polyethylene monofilaments filter cloth, it is characterized in that, for single layer structure, its warp is made into by a monofilament, parallel is made into by another root monofilament, and the diameter of described warp and parallel is 0.07-0.2mm, monofilament tensile strength is more than 1100MPa.Be preferably, the thickness of above-mentioned filter cloth is 0.35mm, average pore size 20 μm, aperture than 0.8, grammes per square metre 280g/m
2, Air permenbility 0.8m
3/ m
2min;
The tensile strength irregularity of described monofilament all within 5%, elongation at break is all less than 10%, extension at break irregularity all within 2%, elastic modelling quantity is 20-60Gpa.
The another kind of technical scheme that the present invention adopts for achieving the above object is, a kind of ultra-high molecular weight polyethylene monofilaments filter cloth, is characterized in that, is double-decker, and the arrangement of its table back warp is than being 4:1, and the arrangement of table back weft is than being 4:1, and access node method is binding pick method;
The filter cloth of described double-decker form, the warp of its table organization is made into by a monofilament, parallel is made into by another root monofilament, and the warp of inner tissue is made into by a monofilament, parallel is made into by another root monofilament;
The filament diameter of described table organization is 0.07-0.2mm, and monofilament tensile strength is more than 1100MPa;
The filament diameter of described inner tissue is 0.6mm, and monofilament tensile strength is more than 1000MPa.
Be preferably, the thickness of above-mentioned filter cloth is 1.3mm, table organization's average pore size 20 μm, grammes per square metre 800g/m
2, Air permenbility 0.5m
3/ m
2min;
The tensile strength irregularity of the monofilament of described table organization and the monofilament of described inner tissue all within 5%, elongation at break is all less than 10%, extension at break irregularity all within 2%, elastic modelling quantity is 20-60Gpa.
Further preferably, for above-mentioned individual layer or double-deck filter cloth, all can be woven into: fabric width is 1.8m; Decorative pattern is plain weave, twill, satin weave or compound pattern.
The technique effect that technique scheme is directly brought is, the ultra-high molecular weight polyethylene monofilaments filter cloth woven by ultra-high molecular weight polyethylene monofilaments, remains the various excellent characteristic of ultra-high molecular weight polyethylene.Such as, intensity is high, surface property good, strong alkali-acid resistance, wearability are good, toughness and fatigue performance is good, long service life, filter cake easily peel off, and be easy to the features such as regeneration.
The filter cloth of said structure form, thin monofilament concentrates on filter cloth surface, and thick monofilament concentrates on the bottom of filter cloth, and in this structure, thick monofilament increases filter cloth brute force, thus meets strainability and the requirement of strength of filter cloth;
And, because ultra-high molecular weight polyethylene monofilaments surface energy is lower, monofilament surface is smooth, add there is no multifilament and the twisting filter lines of wiring surface and gap, thus solve fouling that the solute that exists in prior art causes in monofilament surface crystallization preferably, harden and high sticky material is not easily peeled off and causes the problems such as filter-cloth filtering performance reduction.
Two of object of the present invention is, provides a kind of preparation method of above-mentioned ultra-high molecular weight polyethylene monofilaments filter cloth.
For the filter cloth of above-mentioned single layer structure, the technical scheme that the present invention is adopted for achieving the above object is, a kind of preparation method of ultra-high molecular weight polyethylene monofilaments filter cloth, is characterized in that, comprise the following steps:
The first step, the spinning process of ultra-high molecular weight polyethylene spun filament:
Prepare ultra-high molecular weight polyethylene melt, be sent to spinneret assembly carry out spinning through single screw extrusion machine, measuring pump successively, spinning temperature is 220-280 DEG C;
Mobility modifier is added with in described ultra-high molecular weight polyethylene melt;
Described spinneret assembly comprises screen pack, distribution plate and spinneret, described spinneret is provided with some spinneret orifices, described spinneret orifice is two-part structure, one section near the port of export is straight hole, another section is interior thick outer thin bellmouth, the diameter of described straight hole is 0.5-1.5mm, and the tapering of described bellmouth is 20-60 degree, is all coated with fluoro-containing plastic or organosilicon on the hole wall of described spinneret orifice He on exit end face;
Second step, the preparation process of ultra-high molecular weight polyethylene preoriented yarn: utilize three roller hauling machines to carry out prestretched to spun filament, obtained preoriented yarn, the initial temperature of prestretched is 20 DEG C, and pre-draw ratio is 2-6;
3rd step, ultra-high molecular weight polyethylene monofilaments forming step: utilize filament stretch equipment to stretch in the silicone oil bath of 90 DEG C to the preoriented yarn of gained, determine different draw ratios by the diameter of described monofilament, be drawn into the monofilament that diameter is 0.07-0.2mm;
4th step, above-mentioned monofilament is made into the step of filter cloth by loom;
5th step, filter cloth post-processing step;
Described post-processing step comprises heat setting step and calendering step successively;
The heat setting temperature of described heat setting step is 100-180 DEG C, and heat-setting time is 60-90 second, and warp-wise tension force is 80-100kN;
Described calendering step comprises tow sides calendering, and calendering temperature is 100-180 DEG C, and the calendering time is 60-90 second.
Be preferably, above-mentioned spinning temperature is preferably chosen as 240 DEG C.
Further preferably, above-mentioned mobility modifier is 1,1,2,3,3, the polymer of 3-hexafluoro-1-propylene and vinylidene fluoride, nano molybdenum disulfide or nano-graphite, the mix ratio of described mobility modifier is the 1-1.5% of ultra-high molecular weight polyethylene melt weight.
For above-mentioned double-deck filter cloth, the technical scheme that the present invention is adopted for achieving the above object is, a kind of preparation method of ultra-high molecular weight polyethylene monofilaments filter cloth, is characterized in that, comprise the following steps:
The first step, the spinning process of ultra-high molecular weight polyethylene spun filament:
Prepare ultra-high molecular weight polyethylene melt, be sent to spinneret assembly carry out spinning through single screw extrusion machine, measuring pump successively, spinning temperature is 220-280 DEG C;
Mobility modifier is added with in described ultra-high molecular weight polyethylene melt;
Described spinneret assembly comprises screen pack, distribution plate and spinneret, described spinneret is provided with some spinneret orifices, described spinneret orifice is two-part structure, one section near the port of export is straight hole, another section is interior thick outer thin bellmouth, the diameter of described straight hole is 0.5-1.5mm, and the tapering of described bellmouth is 20-60 degree, is all coated with fluoro-containing plastic or organosilicon on the hole wall of described spinneret orifice He on exit end face;
Second step, the preparation process of ultra-high molecular weight polyethylene preoriented yarn:
Utilize three roller hauling machines to carry out prestretched to spun filament, obtained preoriented yarn, the initial temperature of prestretched is 20 DEG C, and pre-draw ratio is 2-6;
3rd step, ultra-high molecular weight polyethylene monofilaments forming step:
Utilize filament stretch equipment to stretch in the silicone oil bath of 90 DEG C to the preoriented yarn of gained, determine different draw ratios by the diameter of described monofilament, be drawn into the monofilament that diameter is 0.07-0.2mm and 0.6mm respectively;
4th step, above-mentioned monofilament is made into the step of filter cloth by loom;
5th step, filter cloth post-processing step;
Described post-processing step comprises heat setting step and calendering step successively;
The heat setting temperature of described heat setting step is 100-180 DEG C, and heat-setting time is 60-90 second, and warp-wise tension force is 80-120kN;
Described calendering step comprises tow sides calendering, and calendering temperature is 100-180 DEG C, and the calendering time is 60-90 second.
The technique effect that technique scheme is directly brought is, adopt melt spinning process, ultra-high molecular weight polyethylene heating and melting is become the spinning melt of certain viscosity, then ultra-high molecular weight polyethylene monofilaments is spun into, its spinning process does not need solvent and precipitating reagent, equipment is simple, and technological process is short, thus greatly reduces the processing cost of monofilament;
In technique scheme, by adding mobility modifier in ultra-high molecular weight polyethylene melt, the liquidity scale of melt is made to meet melt spinning requirement;
And adopt two-part version to be straight hole near one section of the port of export, another section is interior thick outer thin bellmouth, the diameter of straight hole is 0.5-1.5mm, the tapering of bellmouth is 20-60 degree, fluoro-containing plastic or organosilicon is all coated with on the hole wall of spinneret orifice He on exit end face, the spinneret orifice of this version, be conducive to ensureing ultra-high molecular weight polyethylene melt extrusion speed and extrusion capacity constant in the unit interval, and effectively reduce ultra-high molecular weight polyethylene melt and the adhesion between spinneret orifice inwall and exit wall, effectively to avoid the generation of ultra-high molecular weight polyethylene monofilaments phenomenon of rupture in melt spinning process, and improve spun filament molding effect, meet the condition of the final drawing and forming of 0.07-0.2mm diameter monofilament.
Be preferably, above-mentioned spinning temperature is preferably chosen as 240 DEG C.Further preferably, above-mentioned mobility modifier is 1,1,2,3,3, the polymer of 3-hexafluoro-1-propylene and vinylidene fluoride, nano molybdenum disulfide or nano-graphite, the mix ratio of described mobility modifier is the 1-1.5% of ultra-high molecular weight polyethylene melt weight.
The technique effect that this optimal technical scheme is directly brought is, 1,1,2,3,3,3-hexafluoro-1-propylene and 1, the polymer of 1-difluoroethylene, nano molybdenum disulfide or nano-graphite, all have and reduce apparent viscosity, reduce melt fracture, eliminate mouth mould buildup, reduce melt pressure, improve surface quality, improve unit output, enhance product performance and surface quality, the performance that the extension device continuous seepage time etc. are good;
Illustrate: adding of above-mentioned mobility modifier, the processability of ultra-high molecular weight polyethylene can be improved, and can not have an impact to the physical and mechanical properties of matrix resin.
In sum, ultra-high molecular weight polyethylene monofilaments filter cloth filter cloth of the present invention is relative to prior art, the outstanding advantages such as (smooth surface, do not adhere to, ant-scaling), filter effect is outstanding, strong alkali-acid resistance, wearability are good, toughness and fatigue performance is good, long service life that has that intensity is high, surface property good, filter cake easily peels off, and be easy to regeneration, low cost of manufacture, is more suitable for suitability for industrialized production;
Its raw material thread adopts ultra-high molecular weight polyethylene melt spinning process, high molecular polymerization heating and melting is become the spinning melt of certain viscosity, utilize the ultra-high molecular weight polyethylene monofilaments that melt spinning process is spun into, its spinning process does not need solvent and precipitating reagent, equipment is simple, technological process is short, thus greatly reduces the processing cost of monofilament.
Accompanying drawing explanation
Fig. 1 is the structural representation (from spinneret orifice import to Way out) of spinneret;
Fig. 2 is spinneret orifice sectional structure (amplification) schematic diagram.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in detail.
Embodiment 1
For the ultra-high molecular weight polyethylene monofilaments filter cloth of single layer structure form, its warp is made into by a monofilament, parallel is made into by another root monofilament, and the diameter of described warp and parallel is 0.07mm, monofilament tensile strength is more than 1100MPa;
The tensile strength irregularity of above-mentioned monofilament within 5%, elongation at break is less than 10%, extension at break irregularity within 2%, elastic modelling quantity is 20-60Gpa.
Filter cloth thickness is 0.35mm, average pore size 20 μm, aperture than 0.8, grammes per square metre 280g/m
2, Air permenbility 0.8m
3/ m
2min;
The fabric width of filter cloth is 1.8m, and decorative pattern is plain weave.
Embodiment 2
The diameter of warp and parallel is 0.10mm; Decorative pattern is twill.
Its with all with embodiment 1.
Embodiment 3
The diameter of warp and parallel is 0.15mm; Decorative pattern is satin weave.
Its with all with embodiment 1.
Embodiment 4
The diameter of warp and parallel is 0.20mm; Decorative pattern is compound pattern.
Its with all with embodiment 1.
The ultra-high molecular weight polyethylene monofilaments filter cloth of above-described embodiment 1 to 4 is all adopted and is made with the following method:
Preparation method comprises the following steps:
The first step, the spinning process of ultra-high molecular weight polyethylene spun filament:
Prepare ultra-high molecular weight polyethylene melt, be sent to spinneret assembly carry out spinning through single screw extrusion machine, measuring pump successively, spinning temperature is 220-280 DEG C;
Mobility modifier is added with in described ultra-high molecular weight polyethylene melt;
Described spinneret assembly comprises screen pack, distribution plate and spinneret, described spinneret is provided with some spinneret orifices, described spinneret orifice is two-part structure, one section near the port of export is straight hole, another section is interior thick outer thin bellmouth, the diameter of described straight hole is 0.5-1.5mm, and the tapering of described bellmouth is 20-60 degree, is all coated with fluoro-containing plastic or organosilicon on the hole wall of described spinneret orifice He on exit end face;
Second step, the preparation process of ultra-high molecular weight polyethylene preoriented yarn:
Utilize three roller hauling machines to carry out prestretched to spun filament, obtained preoriented yarn, the initial temperature of prestretched is 20 DEG C, and pre-draw ratio is 2-6;
3rd step, ultra-high molecular weight polyethylene monofilaments forming step:
Utilize filament stretch equipment to stretch in the silicone oil bath of 90 DEG C to the preoriented yarn of gained, determine different draw ratios by the diameter of described monofilament, be drawn into the monofilament that diameter is 0.07-0.2mm;
4th step, above-mentioned monofilament is made into the step of filter cloth by loom;
5th step, filter cloth post-processing step;
Described post-processing step comprises heat setting step and calendering step successively;
The heat setting temperature of described heat setting step is 100-180 DEG C, and heat-setting time is 60-90 second, and warp-wise tension force is 80-100kN;
Described calendering step comprises tow sides calendering, and calendering temperature is 100-180 DEG C, and the calendering time is 60-90 second.
Above-mentioned spinning temperature is preferably chosen as 240 DEG C.
Above-mentioned mobility modifier is preferably the polymer of 1,1,2,3,3,3-hexafluoro-1-propylene and vinylidene fluoride, nano molybdenum disulfide or nano-graphite, and the mix ratio of described mobility modifier is the 1-1.5% of ultra-high molecular weight polyethylene melt weight.
Embodiment 5
For the ultra-high molecular weight polyethylene monofilaments filter cloth of double-decker form, the arrangement of its table back warp is than being 4:1, and the arrangement of table back weft is than being 4:1, and access node method is binding pick method;
The warp of its table organization is made into by a monofilament, parallel is made into by another root monofilament, and the warp of inner tissue is made into by a monofilament, parallel is made into by another root monofilament;
The filament diameter of table organization is 0.07mm, monofilament tensile strength is more than 1100MPa;
In tissue filament diameter be 0.6mm, monofilament tensile strength is more than 1000MPa.
The monofilament of above-mentioned table organization and the monofilament tensile strength irregularity of inner tissue all within 5%, elongation at break is all less than 10%, extension at break irregularity all within 2%, elastic modelling quantity is 20-60Gpa;
Filter cloth thickness is 1.3mm, table organization's average pore size 20 μm, grammes per square metre 800g/m
2, Air permenbility 0.5m
3/ m
2min;
The fabric width of filter cloth is 1.8m, and decorative pattern is plain weave.
Embodiment 6
The filament diameter of table organization is 0.12mm;
Decorative pattern is twill;
All the other are all with embodiment 5.
Embodiment 7
The filament diameter of table organization is 0.15mm; Decorative pattern is satin weave.
All the other are all with embodiment 5.
Embodiment 8
The filament diameter of table organization is 0.20mm;
Decorative pattern is compound pattern;
All the other are all with embodiment 5.
The ultra-high molecular weight polyethylene monofilaments filter cloth of above-described embodiment 5 to 8 is all adopted and is made with the following method:
Preparation method comprises the following steps:
The first step, the spinning process of ultra-high molecular weight polyethylene spun filament:
Prepare ultra-high molecular weight polyethylene melt, be sent to spinneret assembly carry out spinning through single screw extrusion machine, measuring pump successively, spinning temperature is 220-280 DEG C;
Mobility modifier is added with in described ultra-high molecular weight polyethylene melt;
Described spinneret assembly comprises screen pack, distribution plate and spinneret;
As shown in Figure 1 and Figure 2, described spinneret 1 is provided with some spinneret orifices 2, described spinneret orifice 2 is two-part structure, one section near the port of export is straight hole, another section is interior thick outer thin bellmouth, the diameter of described straight hole is 0.5-1.5mm, and the tapering of described bellmouth is 20-60 degree, is all coated with fluoro-containing plastic or organosilicon on the hole wall of described spinneret orifice He on exit end face;
Second step, the preparation process of ultra-high molecular weight polyethylene preoriented yarn:
Utilize three roller hauling machines to carry out prestretched to spun filament, obtained preoriented yarn, the initial temperature of prestretched is 20 DEG C, and pre-draw ratio is 2-6;
3rd step, ultra-high molecular weight polyethylene monofilaments forming step:
Utilize filament stretch equipment to stretch in the silicone oil bath of 90 DEG C to the preoriented yarn of gained, determine different draw ratios by the diameter of described monofilament, be drawn into the monofilament that diameter is 0.07-0.2mm and 0.6mm respectively;
4th step, above-mentioned monofilament is made into the step of filter cloth by loom;
5th step, filter cloth post-processing step;
Described post-processing step comprises heat setting step and calendering step successively;
The heat setting temperature of described heat setting step is 100-180 DEG C, and heat-setting time is 60-90 second, and warp-wise tension force is 80-120kN;
Described calendering step comprises tow sides calendering, and calendering temperature is 100-180 DEG C, and the calendering time is 60-90 second.
Above-mentioned spinning temperature is preferably chosen as 240 DEG C.
Above-mentioned mobility modifier is preferably the polymer of 1,1,2,3,3,3-hexafluoro-1-propylene and vinylidene fluoride, nano molybdenum disulfide or nano-graphite, and the mix ratio of described mobility modifier is the 1-1.5% of ultra-high molecular weight polyethylene melt weight.
It should be noted that:
Setting temperature and the calendering temperature of above-described embodiment 1 to 4 are 120 DEG C, and shaping time and calendering time are 60 seconds.
Heat setting temperature and the calendering temperature of above-described embodiment 5 are 120 DEG C, and the qualitative and calendering time is 90 seconds.
Heat setting temperature and the calendering temperature of above-described embodiment 6 are 180 DEG C, and thermal finalization and calendering time are 60 seconds.
Heat setting temperature in above-described embodiment 7 and calendering temperature are 165 DEG C, and thermal finalization and calendering time are 70 seconds.
Heat setting temperature and the calendering temperature of above-described embodiment 8 are 150 DEG C, and thermal finalization and calendering time are 75 seconds.
Contrast and experiment shows:
The ultra-high molecular weight polyethylene monofilaments filter cloth of above-described embodiment 1 to 8, compared with the common filter cloth of same level of the prior art, in continuous use procedure, its filtration resistance at least reduces by 20%, filter efficiency at least improves 50%, and the life-span at least extends more than 100%.
Claims (11)
1. a ultra-high molecular weight polyethylene monofilaments filter cloth, is characterized in that, is single layer structure, and its warp is made into by a monofilament, parallel is made into by another root monofilament, and the diameter of described warp and parallel is 0.07-0.2mm, monofilament tensile strength is more than 1100MPa;
The thickness of described filter cloth is 0.35mm, average pore size 20 μm, aperture than 0.8, grammes per square metre 280g/m
2, Air permenbility 0.8m
3/ m
2min;
The tensile strength irregularity of described monofilament all within 5%, elongation at break is all less than 10%, extension at break irregularity all within 2%, elastic modelling quantity is 20-60Gpa.
2. ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 1, is characterized in that, fabric width is 1.8m; Decorative pattern is plain weave, twill, satin weave or compound pattern.
3. a ultra-high molecular weight polyethylene monofilaments filter cloth, is characterized in that, is double-decker, and the arrangement of its table back warp is than being 4:1, and the arrangement of table back weft is than being 4:1, and access node method is binding pick method;
The filter cloth of described double-decker form, the warp of its table organization is made into by a monofilament, parallel is made into by another root monofilament, and the warp of inner tissue is made into by a monofilament, parallel is made into by another root monofilament;
The filament diameter of described table organization is 0.07-0.2mm, and monofilament tensile strength is more than 1100MPa;
The filament diameter of described inner tissue is 0.6mm, and monofilament tensile strength is more than 1000MPa.
4. ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 3, is characterized in that, the thickness of described filter cloth is 1.3mm, table organization's average pore size 20 μm, grammes per square metre 800g/m
2, Air permenbility 0.5m
3/ m
2min;
The tensile strength irregularity of the monofilament of described table organization and the monofilament of described inner tissue all within 5%, elongation at break is all less than 10%, extension at break irregularity all within 2%, elastic modelling quantity is 20-60Gpa.
5. the ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 3 or 4, is characterized in that, fabric width is 1.8m; Decorative pattern is plain weave, twill, satin weave or compound pattern.
6. a preparation method for ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 1, is characterized in that, comprise the following steps:
The first step, the spinning process of ultra-high molecular weight polyethylene spun filament:
Prepare ultra-high molecular weight polyethylene melt, be sent to spinneret assembly carry out spinning through single screw extrusion machine, measuring pump successively, spinning temperature is 220-280 DEG C;
Mobility modifier is added with in described ultra-high molecular weight polyethylene melt;
Described spinneret assembly comprises screen pack, distribution plate and spinneret, described spinneret is provided with some spinneret orifices, described spinneret orifice is two-part structure, one section near the port of export is straight hole, another section is interior thick outer thin bellmouth, the diameter of described straight hole is 0.5-1.5mm, and the tapering of described bellmouth is 20-60 degree, is all coated with fluoro-containing plastic or organosilicon on the hole wall of described spinneret orifice He on exit end face;
Second step, the preparation process of ultra-high molecular weight polyethylene preoriented yarn:
Utilize three roller hauling machines to carry out prestretched to spun filament, obtained preoriented yarn, the initial temperature of prestretched is 20 DEG C, and pre-draw ratio is 2-6;
3rd step, ultra-high molecular weight polyethylene monofilaments forming step:
Utilize filament stretch equipment to stretch in the silicone oil bath of 90 DEG C to the preoriented yarn of gained, determine different draw ratios by the diameter of described monofilament, be drawn into the monofilament that diameter is 0.07-0.2mm;
4th step, above-mentioned monofilament is made into the step of filter cloth by loom;
5th step, filter cloth post-processing step;
Described post-processing step comprises heat setting step and calendering step successively;
The heat setting temperature of described heat setting step is 100-180 DEG C, and heat-setting time is 60-90 second, and warp-wise tension force is 80-100kN;
Described calendering step comprises tow sides calendering, and calendering temperature is 100-180 DEG C, and the calendering time is 60-90 second.
7. the preparation method of ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 6, is characterized in that, described spinning temperature is 240 DEG C.
8. the preparation method of ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 6, is characterized in that, described mobility modifier is the polymer of 1,1,2,3,3,3-hexafluoro-1-propylene and vinylidene fluoride, nano molybdenum disulfide or nano-graphite;
The mix ratio of described mobility modifier is the 1-1.5% of ultra-high molecular weight polyethylene melt weight.
9. a preparation method for ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 3, is characterized in that, comprise the following steps:
The first step, the spinning process of ultra-high molecular weight polyethylene spun filament:
Prepare ultra-high molecular weight polyethylene melt, be sent to spinneret assembly carry out spinning through single screw extrusion machine, measuring pump successively, spinning temperature is 220-280 DEG C;
Mobility modifier is added with in described ultra-high molecular weight polyethylene melt;
Described spinneret assembly comprises screen pack, distribution plate and spinneret, described spinneret is provided with some spinneret orifices, described spinneret orifice is two-part structure, one section near the port of export is straight hole, another section is interior thick outer thin bellmouth, the diameter of described straight hole is 0.5-1.5mm, and the tapering of described bellmouth is 20-60 degree, is all coated with fluoro-containing plastic or organosilicon on the hole wall of described spinneret orifice He on exit end face;
Second step, the preparation process of ultra-high molecular weight polyethylene preoriented yarn:
Utilize three roller hauling machines to carry out prestretched to spun filament, obtained preoriented yarn, the initial temperature of prestretched is 20 DEG C, and pre-draw ratio is 2-6;
3rd step, ultra-high molecular weight polyethylene monofilaments forming step:
Utilize filament stretch equipment to stretch in the silicone oil bath of 90 DEG C to the preoriented yarn of gained, determine different draw ratios by the diameter of described monofilament, be drawn into the monofilament that diameter is 0.07-0.2mm and 0.6mm respectively;
4th step, above-mentioned monofilament is made into the step of filter cloth by loom;
5th step, filter cloth post-processing step;
Described post-processing step comprises heat setting step and calendering step successively;
The heat setting temperature of described heat setting step is 100-180 DEG C, and heat-setting time is 60-90 second, and warp-wise tension force is 80-120kN;
Described calendering step comprises tow sides calendering, and calendering temperature is 100-180 DEG C, and the calendering time is 60-90 second.
10. the preparation method of ultra-high molecular weight polyethylene monofilaments filter cloth according to claim 9, is characterized in that, described spinning temperature is 240 DEG C.
The preparation method of 11. ultra-high molecular weight polyethylene monofilaments filter clothes according to claim 9, is characterized in that, described mobility modifier is the polymer of 1,1,2,3,3,3-hexafluoro-1-propylene and vinylidene fluoride, nano molybdenum disulfide or nano-graphite;
The mix ratio of described mobility modifier is the 1-1.5% of ultra-high molecular weight polyethylene melt weight.
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| CN105568399A (en) * | 2016-01-29 | 2016-05-11 | 太仓市微贯机电有限公司 | Spinneret plate |
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| CN109126283A (en) * | 2018-08-22 | 2019-01-04 | 安徽利思达网业有限公司 | A kind of preparation method of sludge dewatering monofilament filter cloth |
| CN109173471A (en) * | 2018-10-26 | 2019-01-11 | 浙江鸿盛环保科技集团有限公司 | double-layer filter material and filter bag |
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