CN103374817B - Short fiber with microfiber structure, filter felt, and manufacturing method of filter felt - Google Patents
Short fiber with microfiber structure, filter felt, and manufacturing method of filter felt Download PDFInfo
- Publication number
- CN103374817B CN103374817B CN201210109826.2A CN201210109826A CN103374817B CN 103374817 B CN103374817 B CN 103374817B CN 201210109826 A CN201210109826 A CN 201210109826A CN 103374817 B CN103374817 B CN 103374817B
- Authority
- CN
- China
- Prior art keywords
- short fiber
- fiber
- para
- aromatic polyamide
- felt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Abstract
The invention relates to a short fiber with a microfiber structure, a filter felt, and a manufacturing method of the filter felt. The short fiber is para-position aromatic polyamide fiber with the Schopper degree of 15-25 SR and the length of 30mm-70mm. After the fiber is independently used or mixed with one of other heat-resisting fibers or a mixture of the heat-resisting fibers, the filter felt product with high filtering precision is manufactured. The filter felt has high filtering precision, and can be used for removing atmospheric dust with the level of 2.5 microns.
Description
Technical field
The present invention relates to a kind of fiber for filtering material and preparation method thereof, particularly relate to a kind of staple fibre containing microfibrillar structure and preparation method thereof.The invention still further relates to a kind of filter felt be made up of the staple fibre containing microfibrillar structure and preparation method thereof.
Background technology
Contraposition aromatic amides fiber, chemical name: Fanglun 1414, be called for short Fanglun l414 fiber or para-aramid fiber, PPTA condensate obtains a kind of high strength and resistant to elevated temperatures fiber filament by fiber spinning from crystalline state, can stand the operating temperature of 200 DEG C under the dry condition.The structure of under cover fibril in its fibre structure, and commercially available fiber be a kind of cross section is circular, that surface is very bright and clean fiber, the diameter of fiber is at 10 ~ 30 microns.
Filter material selected by the high temperature resistance filtration material of current making, mainly contain para-aramid fiber, meta-aramid fibers, polyphenylene sulfide fibre, polytetrafluoroethylene fibre, your azoles fiber of glass fibre, Evil etc., or be used alone, or it is used in combination, the diameter of these fibers is substantially between 6 microns to 50 microns, by current filtering requirement, the main dust-filtering effect test pressing 10 microns, these filtrates all can reach the relevant criterion of country.But, along with country improves further to the requirement of air quality management, as released the monitoring requirement of PM2.5 index, adopting conventional fibre to prepare filtrate, being difficult to the dust-filtering requirement reaching 2.5 microns.Although there is now the technology of coated filter material, in use, filter bag shakes and repeatedly rinses coated filter material repeatedly, very easily comes off, and service life is far away from non-coated filter material; Coated filter material brings windage to improve simultaneously, and in dust removal process, energy consumption is larger.
In the prior art, Fanglun slurry cake has fibrillation structure, see preparation method and the product (Chinese invention patent application number: 200810225082.4) of the PPTA-pulp of Yantai Polyurethane Fibre Co., Ltd, Yizheng Chemical Fiber Co., Ltd., SINOPEC, method (the Chinese invention patent application number: 200810244770.5) being prepared PPTA-pulp by p-aramid fiber waste silk chopped fiber of South China Science & Engineering University, preparation method's (Chinese invention patent application number: 02138112.7) of the PPTA-pulp of Donghua University, 200810035456.6) and a kind of manufacture method of Fanglun slurry cake (Chinese invention patent application number: 03129083.3) etc. the method (Chinese invention patent application number: of being produced Fanglun slurry cake by waste aramid material of Shanghai Yiji Sci-Tech Co., Ltd., although the Xiao Baierdu of these pulps can reach 25SR ~ 40SR, but these pulp length are extremely short, generally only has 0.1 ~ 5 millimeter, friction and seal is used for usually used as filler, carding cannot be used for and make filter felt.
Summary of the invention
For above shortcomings in prior art, one of technical problem to be solved by this invention provides a kind of short fiber of para-aromatic polyamide containing microfibrillar structure.
Two of technical problem to be solved by this invention provides the preparation method of described short fiber of para-aromatic polyamide.
Three of technical problem to be solved by this invention provide a kind of by the short fiber of para-aromatic polyamide containing microfibrillar structure separately or the filter felt be mixed with other heat resistance fiber, this filter felt has high filtering precision, may be used for the atmospheric dust of removal 2.5 micron level.
Four of technical problem to be solved by this invention provides the preparation method of described filter felt.
Technical problem to be solved by this invention, is achieved by the following technical solution:
A short fiber of para-aromatic polyamide containing microfibrillar structure, the Xiao Baierdu 15 ~ 25SR of its fiber, staple length is at 30 ~ 70 millimeters.
For obtaining the short fiber of para-aromatic polyamide containing microfibrillar structure that can be used for textile process, must control the Xiao Baierdu index of fiber and the length index of fiber well, fiber is in the processing procedure of fibrillation, fiber is easy in beater cut-off, research shows when Xiao Baierdu is lower than 15SR, the extent of microfibrillation of fiber is not enough, the atmospheric dust of 2.5 micron levels effectively can not be removed after making filter felt, when Xiao Baierdu is greater than 25SR, because extent of microfibrillation is excessive, tangle between fiber serious, and make the shredding of fiber very difficult, textile process can not be carried out.
In pulping process, beater produces cutting action to fiber, very difficult to the fibre length of 30 ~ 70 millimeters keeping weaving available.A kind of preprocess method is introduced in the present invention, make fiber obtain loose structure through process before entering beater, make fiber more easily form fibrillation, thus reduce the mechanicals efforts in processing procedure, reduce beater to the cutting action of fiber, keep the length of fiber.
Present invention also offers the preparation method of the above-mentioned short fiber of para-aromatic polyamide containing microfibrillar structure, by contraposition aromatic polyamide long filament, cut into 50 ~ 100 millimeters, preferably cut into 80 ~ 100 millimeters, impregnation process in puffing adjuvant, again through making beating beating 30 ~ 90 minutes, make the described short fiber of para-aromatic polyamide containing microfibrillar structure.
Wherein, described puffing adjuvant is the ethanolic solution of dioctyl phthalate, the mass percentage concentration of the dioctyl phthalate in described puffing adjuvant is 5 ~ 20wt%, the weight ratio of puffing adjuvant and short fiber of para-aromatic polyamide is 5: 1 ~ 20: 1, at normal temperatures impregnation process 1 ~ 5 hour.
Described making beating beating step, carries out in beater, and this beater can be the conventional open type beater used in paper.Short fiber of para-aromatic polyamide in beater and water form mixing suspension, and the Mixing ratio by weight of short fiber of para-aromatic polyamide and water is 1: 50 ~ 1: 200, and circular flow is 2 ~ 10 tons/minute.
Also comprise, after described making beating beating step, carry out drying and packing, bake out temperature is 100 ~ 150 DEG C, and dried moisture content is at 3 ~ 6wt%.
Can obtain conventional p-aromatic polyamide fiber long filament from the market, long filament specification can be the long filament volume of 1100 dawn, 1500 dawn, 3300 dawn or other more crin bundle, and the monofilament fineness of this long filament is below 2 dawn, and intensity is at more than 15cN/dtex.This kind of long filament can be the para-aramid fiber etc. that the calm and peaceful para-aramid fiber in Tawron brand fiber, the para-aramid fiber of Hyosung Corporation of Korea S, the para-aramid fiber of Cologne company of Korea S, Yantai that Kavlar brand fiber, Di Ren company that E.I.Du Pont Company produces produce and other company produce.
Multiple filament to be intervolved and boundling, formed 50,000 dawn ~ tow at 200,000 dawn, then cut off, shearing length controls the staple fibre at 50 ~ 100 millimeters.
Dioctyl phthalate can be buied from the market, in preliminary treatment still, dioctyl phthalate is dissolved in ethanol, the mass percentage concentration being modulated into dioctyl phthalate is the puffing adjuvant of 5 ~ 20wt%, the staple fibre of above-mentioned cut-out is poured in preliminary treatment still according to the ratio of the weight ratio 5: 1 ~ 20: 1 of puffing adjuvant and short fiber of para-aromatic polyamide, be uniformly mixed, impregnation process 1 ~ 5 hour at normal temperatures, remove the finish of fiber surface, and make fiber swelling, make the structure of fiber become loose.
Staple fibre after puffing adjuvant pretreatment, after water cleaning, then the conventional open type beater making beating used in paper, short fiber of para-aromatic polyamide in beater/water mixing suspension Mixing ratio by weight is 1: 50 ~ 1: 200, circular flow is 2 ~ 10 tons per minute, in beater pond, suspension one edge water (flow) direction circulates in the pond of ellipse, the paddle wheel of economy-combat on one side knocking, swelling loose after fiber after beating, the fento hidden in the fibre is separated the surface of fiber gradually, be attached on trunk fiber.Circulation beating is after 30 ~ 90 minutes, and the quantity of fento reaches desirable state, with Xiao Baier--and the method for testing of Rui Gelefa records its Xiao Baierdu at 15 ~ 25SR.
The staple fibre with microfibrillar structure be shifted out from beater contains a large amount of moisture, and dry through chain-and-slat drying machine, bake out temperature 100 ~ 150 DEG C, dried moisture content is 3 ~ 6%.
Staple fibre blower fan is delivered into baling press, finally packs shaping.
Have fento diameter in the Fanglun l414 staple fibre of microfibrillar structure at 0.5 ~ 2 micron not etc., quantity is very many, and mutually intersects, and the quantity of test fento, form can not realize separately.The method of testing of a kind of Xiao Baier-Rui Gelefa is quoted in invention, solves the problem of evaluation fento overall content.Xiao Baier-Rui Gelefa is generally used for the extent of microfibrillation testing papermaking pulp, and extent of microfibrillation is higher, and lock outlet capacity is stronger, both are directly proportional, and when Xiao Baierdu is 8SR, institute surveys material substantially without locking outlet capacity, when Xiao Baierdu is 100SR, object being measured possesses the strongest lock outlet capacity.The content that the method measures fento in the extraordinary Fanglun l414 fiber invented and obtain is refer in the present invention, the feature of a lock water function is possessed based on fento, the fiber Xiao Baierdu of fixed qty is measured by standard GB/T/T3332-1982, evaluate the content of fento, Xiao Baidu index is high, show that this fiber lock outlet capacity is strong, fento content is just large.
Fanglun l414 staple fibre after fibrillation, although its intensity is lost, still can meet the requirements of general filtrate to fibre strength, its intensity is at more than 5cN/dtex, and the intensity of ordinary filter heat resistance fiber is at more than 3cN/dtex.
Kowtowing in solution preocess, beater is to a kind of shear action of processbearing astrocyte, the beating time is longer, fiber is higher by the shear action frequency, fiber is shorter, fiber length and beating time correlation, through circulation beating 30 ~ 90 minutes, the cut to lengthen of the Fanglun l414 staple fibre after fibrillation was at 30 ~ 70 millimeters.This length is suitable for traditional filter material becoming the moderate length in net processing, although there is different distribution of lengths in fibrous mass, do not affect it and become net and effect into the net, mix simultaneously, also can become net with other heat resistance fiber conventional.
Fanglun l414 staple fibre after fibrillation contains abundant fento, Fanglun l414 staple fibre trunk fiber mutually intersects to tangle and forms trunk fiber web, carry most one-tenth web frame intensity, and fento intersects entanglement mutually defines countless micropore, the mesh quantity of the quantity unconventional trunk fiber crossovers formation far away of these micropores, porosity improves, simultaneously these micropores are uniformly distributed and fine, significantly improve filtering accuracy, increase the collision probability of dust granules, the particle that particle diameter is very little can not pass through from space and be captured.Can effectively filter the microparticle of below PM2.5.
Present invention also offers a kind of filter felt with high filtering precision, be made up separately of the described short fiber of para-aromatic polyamide containing microfibrillar structure, or be mixed with other heat-resisting staple fibre.
Wherein, when the described short fiber of para-aromatic polyamide containing microfibrillar structure mixes with other heat-resisting staple fibres, weight part ratio is: short fiber of para-aromatic polyamide 15 ~ 100 weight portion, other heat-resisting staple fibre 0-85 weight portions.Be preferably: short fiber of para-aromatic polyamide 20 ~ 100 weight portion, other heat-resisting staple fibre 10-80 weight portions.More preferably: short fiber of para-aromatic polyamide 30 ~ 100 weight portion, other heat-resisting staple fibre 10-70 weight portions.
Wherein, other heat-resisting staple fibre described is selected from one in polyphony thioether short fiber, meta-aramid staple fibre, your azoles fiber of polytef flocks, Evil and glass fibre or its mixture.
The basic weight of filter felt is 300 ~ 900g/m
2, be preferably 350 ~ 550g/m
2.
There is described in present invention also offers the preparation method of high filtering precision filter felt, comprise following steps:
(1) by the described short fiber of para-aromatic polyamide containing microfibrillar structure and other heat-resisting staple fibre Homogeneous phase mixing shredding carding;
(2) use standard combing and cross winding equipment, these web of staple fibers are transformed into the wrong folded fine felt of intersection;
(3) on standard needing machine or spun-laced machine by fine felt tailor-tacking or slightly reinforce, fine felt more than two panels is merged, and on two sides acupuncture or water thorn with obtained described filter felt;
(4) in the filter felt processing of standard, the form of the base cloth phase compound adopting form or employing filter course net felt without base cloth to be made into other heat resistance fiber yarn.
The quality of described base cloth is 80 ~ 200g/m
2.
Described Ji Bu is made up of polyphony thioether short fiber yarn, meta-aramid short fiber yarn, polytef flocks filament yarn, Evil that azoles short fiber yarn or filament of glass fiber yarn.
Adopting of described base cloth has following principle, heat resistance is higher than under the operating mode of 250 DEG C or under the extremely strong operating mode of corrosivity, generally select the Ji Bu that polytetrafluoroethylfilament filament yarn is made, the filtrate used in the dedusting such as in the dedusting of cement produced with the dry method kiln exit gas or at garbage incinerating tail gas; Under the operating mode of 200 DEG C, and under there is certain corrosivity operating mode, the general Ji Bu using polyphony thioether short fiber yarn to make, the filtrate such as used in the tails dedusting of coal-burning boiler or coal-burning power plant; Below 220 DEG C, and do not corrode or have minute quantity to corrode work condition environment under, the Ji Bu that general use meta-aramid short fibre yarn, Evil that azoles short fibre yarn or fiberglass filament yarn are made, the filtrate such as used in the tails dedusting of cement produced with the dry method kiln hood, blast furnace gas, sintering machine of steel mill head, steel mill's electric smelter, Metallurgical Factory's electric smelter, pitch smelting furnace; The grammes per square metre scope of base cloth is at 80 ~ 200g/m
2, mainly meet more than 850N according to the radial strength of base cloth, latitudinal strength meet at more than 400N.
The main principle that other heat-resisting staple fibre described is selected is, heat resistance is higher than under the operating mode of 250 DEG C or under the extremely strong operating mode of corrosivity, generally select polytetrafluoroethylene fibre, the filtrate used in the dedusting such as in the dedusting of cement produced with the dry method kiln exit gas or at garbage incinerating tail gas; Under the operating mode of 200 DEG C, and under there is certain corrosivity operating mode, generally use polyphony thioether short fiber, the filtrate such as used in the tails dedusting of coal-burning boiler or coal-burning power plant; Below 220 DEG C, and do not corrode or have minute quantity to corrode work condition environment under, general use meta-aramid, Evil that azoles staple fibre or glass, the filtrate such as used in the tails dedusting of cement produced with the dry method kiln hood, blast furnace gas, sintering machine of steel mill head, steel mill's electric smelter, Metallurgical Factory's electric smelter, pitch smelting furnace.
Compared with prior art, tool has the following advantages in the present invention:
Making beating beating technology of the present invention makes any surface finish, the short fiber of para-aromatic polyamide of cross section rounding is transformed to has the form that a large amount of fento is attached to a kind of special short fiber of para-aromatic polyamide of trunk fiber surface, containing this, there is the filter felt of the short fiber of para-aromatic polyamide of microfibrillar structure or mix with other heat-resisting staple fibre containing these fibers and the filter felt made has higher filtering accuracy, can improve 2.5 micron dust filter efficiencies, improve the ability that relevant enterprise tackles air pollution treatment under improvement PM2.5 indicator conditions.
Accompanying drawing explanation
Fig. 1 is conventional Fanglun l414 fibrous structure chart;
Fig. 2 is the structure chart of the short fiber of para-aromatic polyamide of embodiment 1 containing microfibrillar structure.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
(1) cutting fiber:
50 silks are intervolved the tow that stock formed for 80,000 dawn by the contraposition aromatic polyamide long filament volume of 1600 dawn specifications of Kevlar 29 brand adopting E.I.Du Pont Company to produce, and then cut off forming the staple fibre that length is 90 millimeters with guillotine type cutting machine.
(2) puffing adjuvant is prepared:
Be dissolved in the ethanol of 425 kilograms by the dioctyl phthalate of 75 kilograms in preliminary treatment still, be uniformly mixed, preparation puffing adjuvant, the mass percent of described dioctyl phthalate in ethanolic solution is 15%.
(3) impregnation process
The staple fibre taking the well cutting of 50 kilograms is positioned over this and is equipped with in the preliminary treatment still of 500 kilograms of puffing adjuvants, after stirring, floods 2 hours in preliminary treatment still under normal temperature, removes the finish of fiber surface, and make fiber swelling, make the structure of fiber become loose.Then take out the staple fibre after by swelling loosening, clean with pure water.
(4) making beating beating
Then staple fibre being positioned over specification is 5m
3open type beater in, configure 4000 kilograms of pure water, short fiber of para-aromatic polyamide in beater and water form mixing suspension, and the Mixing ratio by weight of short fiber of para-aromatic polyamide and water is 1: 80, open making beating knocking runner, regulating rotary wheel speed, make fiber/water mixed liquor flow at 8 tons/point, lift and kowtow striking wheel bed plate, make fiber kowtow striking wheel place in process, kowtowed striking wheel and bed plate carries out knocking, circulation beating 80 minutes.
(5) dry
Take out moisture staple fibre, in chain-and-slat drying machine, carry out continuous drying, the temperature of dryer is adjusted to 120 DEG C, and dried fiber moisture is 4.5%, then with blower fan, fiber wind is delivered to baling press, finally packs shaping.Obtain a kind of short fiber of para-aromatic polyamide finished product containing microfibrillar structure of the present invention.
Gained fiber examines under a microscope that to have a large amount of diameter be that the fento of 0.5 ~ 2 micron is attached on trunk fiber, as shown in Figure 2.With SDJ-100 type beating degree tester by GB GB/T3332-1982 method test fiber Xiao Baierdu be 23SR.Fiber length after knocking does not become 30 ~ 50 millimeters not etc.
The general E.I.Du Pont Company in random contrast market produces 1.5D × 38 millimeter of Kevlar brand or the short fiber of para-aromatic polyamide of 2D × 51 millimeter specification, present the filament of any surface finish and cross section rounding under the microscope, be 8.1 ~ 8.5SR with SDJ-100 type beating degree tester by the Xiao Baierdu of GB GB/T3332-1982 method test fiber, show that short fiber of para-aromatic polyamide in usually commercially available Kevlar brand is without microfibrillar structure.Randomly draw the short fiber of para-aromatic polyamide that the calm and peaceful company in the Di Ren company of market sale, Hyosung Corporation, Cologne company and Yantai produces, the fiber number of these fibers is 1.5 ~ 2D, length is 38 ~ 74 millimeters, present the filament of any surface finish and cross section rounding under the microscope, with SDJ-100 type beating degree tester by GB GB/T3332-1982 method test fiber Xiao Baierdu be 8 ~ 9SR, show without microfibrillar structure.
Commercially available conventional Fanglun l414 fiber is the filament that any surface finish, cross section are rounded, fibre diameter generally at 12 ~ 30 microns, as shown in Figure 1.Other heat resistance fiber such as meta-aramid, polyphenylene sulfide fibre, glass, Evil that azoles fiber, polytetrafluoroethylene fibres etc. are substantially like this.But Fanglun l414 fiber has a feature in its fiber forming process, namely it is formed through dry-jet wet-spinning fibroblast by liquid crystal, the fiber that this kind of liquid crystal is formed, in fibre structure, conceal many microfibrillar structures, just not by certain technical approach, can not be showed.Meanwhile, Fanglun l414 fiber is mainly used in bulletproof jacket at present, optical cable strengthens cover, tire cord etc., does not need irksome microfibrillar structure to appear in its application.The fento implied in Fanglun l414, by the making beating beating technique used conventional in paper technology, is stripped out, is formed and be made up of, as Fig. 2 the microfibrillar structure of a trunk fiber and many branching shapes by the present invention from its trunk fiber.
Embodiment 2
(1) cutting fiber:
50 silks are intervolved the tow that stock formed for 80,000 dawn, then cut off the staple fibre of formation 90 millimeters with guillotine type cutting machine by the contraposition aromatic polyamide long filament volume of the 1600 dawn specifications adopting the calm and peaceful company in Yantai to produce.
(2) puffing adjuvant is prepared:
Be dissolved in the ethanol of 425 kilograms by the dioctyl phthalate of 75 kilograms in preliminary treatment still, be uniformly mixed, preparation puffing adjuvant, the mass percent of described dioctyl phthalate in ethanolic solution is 15%.
(3) impregnation process
The staple fibre taking the well cutting of 50 kilograms is positioned over this and is equipped with in the preliminary treatment still of 500 kilograms of puffing adjuvants, after stirring, floods 2 hours in preliminary treatment still under normal temperature, removes the finish of fiber surface, and make fiber swelling, make the structure of fiber become loose.Then take out the staple fibre after by swelling loosening, clean with pure water.
(4) making beating beating
Then fiber being positioned over specification is 5m
3open type beater in, configure 4000 kilograms of pure water, open making beating knocking runner, regulating rotary wheel speed, makes fiber/water mixed liquor flow at 5 tons/point, lifts and kowtow striking wheel bed plate, make fiber through kowtowing striking wheel place, kowtowed striking wheel and bed plate carries out knocking, circulation beating 40 minutes.
(5) dry
Take out moisture fiber, in chain-and-slat drying machine, carry out continuous drying, the temperature of dryer is adjusted to 120 DEG C, and dried fiber moisture is 4.5%, then with blower fan, fiber wind is delivered to baling press, finally packs shaping.Obtain a kind of short fiber of para-aromatic polyamide finished product containing microfibrillar structure of the present invention.
Gained fiber examines under a microscope that to have a large amount of diameter be that the fento of 0.5 ~ 2 micron is attached on trunk fiber, is 15SR with SDJ-100 type beating degree tester by the Xiao Baierdu of GB GB/T3332-1982 method test fiber.Fiber length after knocking does not become 50 ~ 70 millimeters not etc.
Embodiment 3
A kind of short fiber of para-aromatic polyamide finished product containing microfibrillar structure that embodiment 2 is obtained, staple fibre is rolled into a ball shredding, then the staple fibre after shredding is made uniform mixture, the combing of use standard and cross winding equipment, these staple fibres are transformed into and intersect wrong folded fine felt, by fine felt tailor-tacking or slightly reinforce on standard needing machine, fine felt more than two panels is merged, and on two sides, acupuncture is with obtained described filter felt, and the grammes per square metre of filter felt is 450g/m
2.
Embodiment 4
A kind of short fiber of para-aromatic polyamide finished product containing microfibrillar structure that embodiment 1 is obtained, staple fibre is rolled into a ball shredding, then the staple fibre after shredding is made uniform mixture, the combing of use standard and cross winding equipment, these staple fibres are transformed into the wrong folded fine felt of intersection, by fine felt tailor-tacking or slightly reinforce on standard needing machine, more than the two panels in these fine felts or two panels will be placed on two up and down of base cloth, and on two sides, water thorn is with obtained filter felt, selects the 120g/m that 20 bifilar polyphenylene sulfide yams are made into
2ji Bu, the grammes per square metre of filter felt is 350g/m
2.
Embodiment 5
A kind of short fiber of para-aromatic polyamide finished product 30 weight portion containing microfibrillar structure that embodiment 1 is obtained, shredding together with the meta-aramid staple fibre that the specification of 70 weight portions is 2D × 51 millimeter, then the staple fibre after shredding is made uniform mixture, the combing of use standard and cross winding equipment, these staple fibres are transformed into the wrong folded fine felt of intersection, by fine felt tailor-tacking or slightly reinforce on standard needing machine, fine felt more than two panels is merged, and on two sides, acupuncture is with obtained described filter felt, and the grammes per square metre of filter felt is 510g/m
2.
Embodiment 6
A kind of short fiber of para-aromatic polyamide finished product 20 weight portion containing microfibrillar structure that embodiment 1 is obtained, shredding together with the specification of 15 weight portions to be the meta-aramid staple fibre of 2D × 51 millimeter and the specification of 65 weight portions the be glass fibre of 8 microns × 51 millimeters, then the staple fibre after shredding is made uniform mixture, the combing of use standard and cross winding equipment, these staple fibres are transformed into the wrong folded fine felt of intersection, by fine felt tailor-tacking or slightly reinforce on standard needing machine, more than the two panels in these fine felts or two panels will be placed on two up and down of base cloth, and acupuncture is with obtained filter felt on two sides, select the 180g/m that filament of glass fiber yarn is made into
2ji Bu, the grammes per square metre of filter felt is 880g/m
2.
Comparative example 1
By the short fiber of para-aromatic polyamide shredding of the 2D × 51 millimeter specification of the E.I.Du Pont Company Kevlar brand of conventional commercial, then the staple fibre after shredding is made uniform mixture, the combing of use standard and cross winding equipment, these staple fibres are transformed into the wrong folded fine felt of intersection, by fine felt tailor-tacking or slightly reinforce on standard needing machine, merged by fine felt more than two panels, and acupuncture is with obtained described filter felt on two sides, the grammes per square metre of filter felt is 450g/m
2.
Used short fiber of para-aromatic polyamide is examined under a microscope, it presents the filament of any surface finish and cross section rounding, with SDJ-100 type beating degree tester by GB GB/T3332-1982 method test fiber Xiao Baierdu be 8.3SR, show that it is without microfibrillar structure.
Comparative example 2
By the polyphony thioether short fiber shredding of 1.5D × 51 of the Dong Li company of conventional commercial millimeter, then the staple fibre after shredding is made uniform mixture, the combing of use standard and cross winding equipment, these staple fibres are transformed into the wrong folded fine felt of intersection, by fine felt tailor-tacking or slightly reinforce on standard needing machine, merged by fine felt more than two panels, and acupuncture is with obtained described filter felt on two sides, the grammes per square metre of filter felt is 480g/m
2.
Used polyphony thioether short fiber is examined under a microscope, it presents the filament of any surface finish and cross section rounding, with SDJ-100 type beating degree tester by GB GB/T3332-1982 method test fiber Xiao Baierdu be 6.5SR, show that it is without microfibrillar structure.
Comparative example 3
By the meta-aramid staple fibre shredding of 2D × 51 calm and peaceful for the Yantai of conventional commercial millimeter, then the staple fibre after shredding is made uniform mixture, the combing of use standard and cross winding equipment, these staple fibres are transformed into the wrong folded fine felt of intersection, by fine felt tailor-tacking or slightly reinforce on standard needing machine, more than the two panels in these fine felts or two panels will be placed on two up and down of base cloth, and acupuncture is with obtained filter felt on two sides, select the 120g/m that 20 bifilar meta-aramid staple fibre yarns are made into
2ji Bu, the grammes per square metre of filter felt is 480g/m
2.
Used meta-aramid staple fibre is examined under a microscope, it presents the filament of any surface finish and cross section rounding, with SDJ-100 type beating degree tester by GB GB/T3332-1982 method test fiber Xiao Baierdu be 7.1SR, show that it is without microfibrillar structure.
By filter felt made in embodiment 3-6 and comparative example 1-3, GB/T6165-1985 method is adopted to measure the filter efficiency of 2.5 micron dusts.
The filter efficiency test value table of fiber Xiao Baierdu and 2.5 micron dusts
Fanglun l414 staple fibre after fibrillation contains abundant fento, Fanglun l414 staple fibre trunk fiber mutually intersects to tangle and forms trunk fiber web, carry most one-tenth web frame intensity, and fento intersects entanglement mutually defines countless micropore, the mesh quantity of the quantity unconventional trunk fiber crossovers formation far away of these micropores, porosity improves, simultaneously these micropores are uniformly distributed and fine, significantly improve filtering accuracy, increase the collision probability of dust granules, the particle that particle diameter is very little can not pass through from space and be captured.Can effectively filter the microparticle of below PM2.5, therefore filter felt of the present invention has very high filter efficiency.
The above; be only the specific embodiment of the present invention; but protection scope of the present invention is not limited thereto; any those of ordinary skill in the art are in the technical scope disclosed by the present invention; the change can expected without creative work or replacement, all should be encompassed within protection scope of the present invention.Therefore, the protection domain that protection scope of the present invention should limit with claims is as the criterion.
Claims (9)
1. the short fiber of para-aromatic polyamide containing microfibrillar structure, is characterized in that: the Xiao Baierdu of described staple fibre is 15 ~ 25SR, and described staple length is at 30 ~ 70 millimeters; The described short fiber of para-aromatic polyamide containing microfibrillar structure is prepared by following method: contraposition aromatic polyamide long filament is cut into 50 ~ 100 millimeters, impregnation process in puffing adjuvant, again through making beating beating 30 ~ 90 minutes, make the described short fiber of para-aromatic polyamide containing microfibrillar structure, wherein said puffing adjuvant is the ethanolic solution of dioctyl phthalate.
2. according to the short fiber of para-aromatic polyamide containing microfibrillar structure described in claim 1, it is characterized in that: the mass percentage concentration of the dioctyl phthalate in described puffing adjuvant is 5 ~ 20wt%, the weight ratio of puffing adjuvant and short fiber of para-aromatic polyamide is 5:1 ~ 20:1, at normal temperatures impregnation process 1 ~ 5 hour.
3. according to the short fiber of para-aromatic polyamide containing microfibrillar structure described in claim 1, it is characterized in that: described making beating beating step is carried out in beater, short fiber of para-aromatic polyamide in beater and water form mixing suspension, the Mixing ratio by weight of short fiber of para-aromatic polyamide and water is 1:50 ~ 1:200, and circular flow is 2 ~ 10 tons/minute.
4., according to the short fiber of para-aromatic polyamide containing microfibrillar structure described in claim 1, it is characterized in that: after described making beating beating step, increase baking step, described bake out temperature is 100 ~ 150 DEG C, and dried moisture content is at 3 ~ 6wt%.
5. there is a filter felt for high filtering precision, it is characterized in that: be made up of the short fiber of para-aromatic polyamide containing microfibrillar structure described in claim 1.
6. one kind has the filter felt of high filtering precision, it is characterized in that: be mixed by the short fiber of para-aromatic polyamide containing microfibrillar structure described in claim 1 and other heat-resisting staple fibres, described short fiber of para-aromatic polyamide 20 ~ 100 weight portion containing microfibrillar structure, other heat-resisting staple fibre 10 ~ 80 weight portions described, other heat-resisting staple fibre described is selected from one in polyphony thioether short fiber, meta-aramid staple fibre, your azoles fiber of polytef flocks, Evil and glass fibre or its mixture.
7. the filter felt with high filtering precision according to claim 6, is characterized in that: the basic weight of filter felt is 300 ~ 900g/m
2.
8. the preparation method with the filter felt of high filtering precision according to claim 6, is characterized in that, comprise following steps:
(1) by the described short fiber of para-aromatic polyamide containing microfibrillar structure and other heat-resisting staple fibre Homogeneous phase mixing shredding carding;
(2) use standard combing and cross winding equipment, these web of staple fibers are transformed into the wrong folded fine felt of intersection;
(3) on standard needing machine or spun-laced machine by fine felt tailor-tacking or slightly reinforce, fine felt more than two panels is merged, and on two sides acupuncture or water thorn with obtained described filter felt; In the filter felt processing of standard, the form of the base cloth phase compound adopting form or employing filter course net felt without base cloth to be made into other heat resistance fiber yarn.
9. the preparation method with the filter felt of high filtering precision according to claim 8, it is characterized in that: described Ji Bu is made up of polyphony thioether short fiber yarn, meta-aramid short fiber yarn, polytef flocks filament yarn, Evil that azoles short fiber yarn or filament of glass fiber yarn, and quality is 80 ~ 200g/m
2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210109826.2A CN103374817B (en) | 2012-04-13 | 2012-04-13 | Short fiber with microfiber structure, filter felt, and manufacturing method of filter felt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210109826.2A CN103374817B (en) | 2012-04-13 | 2012-04-13 | Short fiber with microfiber structure, filter felt, and manufacturing method of filter felt |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103374817A CN103374817A (en) | 2013-10-30 |
| CN103374817B true CN103374817B (en) | 2015-05-20 |
Family
ID=49460624
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210109826.2A Active CN103374817B (en) | 2012-04-13 | 2012-04-13 | Short fiber with microfiber structure, filter felt, and manufacturing method of filter felt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103374817B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105297283B (en) * | 2015-09-21 | 2018-07-13 | 武汉纺织大学 | A kind of p-aramid fiber nanofiber/non-woven fabric compounded filtrate of polyphenylene sulfide and preparation method thereof |
| WO2017169687A1 (en) * | 2016-03-29 | 2017-10-05 | 東レ株式会社 | Laminated polyarylene sulfide heat-resistant filter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5290449A (en) * | 1991-07-22 | 1994-03-01 | Lydall, Inc. | Blood filter material |
| CN101032674A (en) * | 2006-03-08 | 2007-09-12 | 东丽纤维研究所（中国）有限公司 | Filtering material of thermal stability and the purpose thereof |
| CN101367020A (en) * | 2008-09-05 | 2009-02-18 | 华南理工大学 | Double-layer filter material for internal combustion engine |
| CN101380535A (en) * | 2008-09-28 | 2009-03-11 | 华南理工大学 | Multiple layer composite micropore filtration separation material and preparation method and use thereof |
| CN101440589A (en) * | 2008-12-17 | 2009-05-27 | 中国石化仪征化纤股份有限公司 | Method for preparing contraposition aramid fiber dissolving pulp from contraposition aramid fiber waste silk chopped fiber |
| CN201454266U (en) * | 2009-07-23 | 2010-05-12 | 上海华成针刺材料有限公司 | Aromatic polyamide high-temperature-resistant surface coat filter felt |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2806582B2 (en) * | 1989-12-28 | 1998-09-30 | 三菱製紙株式会社 | Activated carbon fiber sheet and filter |
| JP2001129329A (en) * | 1999-11-02 | 2001-05-15 | Oshidari Kenkyusho:Kk | Reinforcing material for fluoroplastic membrane filter and fluoroplastic membrane filter |
| US8252449B2 (en) * | 2004-04-16 | 2012-08-28 | Mitsubishi Paper Mills Limited | Separator for electrochemical element |
| US7740741B2 (en) * | 2005-12-21 | 2010-06-22 | E.I. Du Pont De Nemours And Company | Para-aramid pulp including meta-aramid fibrids and processes of making same |
| CN101381898B (en) * | 2008-10-14 | 2011-08-17 | 华南理工大学 | Fibrillation dissolving pulp, method for making same and applications |
| CN101457405A (en) * | 2008-10-28 | 2009-06-17 | 烟台氨纶股份有限公司 | Method for preparing para-aramid dissolving pulp and products |
-
2012
- 2012-04-13 CN CN201210109826.2A patent/CN103374817B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5290449A (en) * | 1991-07-22 | 1994-03-01 | Lydall, Inc. | Blood filter material |
| CN101032674A (en) * | 2006-03-08 | 2007-09-12 | 东丽纤维研究所（中国）有限公司 | Filtering material of thermal stability and the purpose thereof |
| CN101367020A (en) * | 2008-09-05 | 2009-02-18 | 华南理工大学 | Double-layer filter material for internal combustion engine |
| CN101380535A (en) * | 2008-09-28 | 2009-03-11 | 华南理工大学 | Multiple layer composite micropore filtration separation material and preparation method and use thereof |
| CN101440589A (en) * | 2008-12-17 | 2009-05-27 | 中国石化仪征化纤股份有限公司 | Method for preparing contraposition aramid fiber dissolving pulp from contraposition aramid fiber waste silk chopped fiber |
| CN201454266U (en) * | 2009-07-23 | 2010-05-12 | 上海华成针刺材料有限公司 | Aromatic polyamide high-temperature-resistant surface coat filter felt |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103374817A (en) | 2013-10-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Karmakar | Chemical technology in the pre-treatment processes of textiles | |
| CN103374852B (en) | A kind of manufacture method of sisal fiber wet nonwoven fabrics | |
| CN1063241C (en) | Plush fabric capable of generating long/short piles, pill-like fabric and method of production thereof | |
| CN103374817B (en) | Short fiber with microfiber structure, filter felt, and manufacturing method of filter felt | |
| CN104695060B (en) | A kind of preparation method of lignin-base hollow carbon fiber | |
| CA1257125A (en) | Papermachine clothing | |
| KR19990029093A (en) | Dragon microfiber fiber | |
| CN113474835A (en) | Nonwoven fabric for sound absorbing material, and method for producing nonwoven fabric for sound absorbing material | |
| CN110528151A (en) | A kind of modified viscose fabric of biomass graphene and its method for weaving | |
| CN110029408A (en) | A kind of elastic composite fiber and its manufacturing method | |
| CN113304546A (en) | High-temperature-resistant filter material for ultralow emission | |
| Park et al. | A study on coarse Hanji yarn manufacturing and properties of the Hanji fabric | |
| CN106987948A (en) | A kind of production method of the blended yarn weaved fabric of cotton fiber and sisal fiber | |
| EP1591571A1 (en) | Down branch fiber fabric and the fabricating method thereof | |
| CN208065945U (en) | Compound nonwoven cloth for filtering dust | |
| CN1127312A (en) | Asbestos yarn producing method from asbestos short fibre fettling paper | |
| CN110205815A (en) | A kind of preparation method of antibiosis anti-acarien fabric | |
| JP2011202327A (en) | Fabric comprising easy-to-dye meta-wholly aromatic polyamide fiber | |
| CN115874294A (en) | Method for manufacturing kudzu fiber, method for manufacturing kudzu yarn comprising the kudzu fiber, and woven fabric manufactured thereby | |
| CN1075573C (en) | Process and apparatus for spinning and weaving fire-retardant fabric of preliminaril oxidized silk | |
| CN109930211B (en) | Large-scale preparation method of moisture-absorbing and sweat-releasing yarn with superfine short fiber structure | |
| JP2015074851A (en) | Wet nonwoven fabric and fiber product | |
| CN109763260B (en) | Composite cloth of superfine denier viscose fiber and lyocell fiber and preparation process thereof | |
| CN109505048B (en) | Silk scarf fabric based on superfine mulberry silk fibers/tussah silk fibers | |
| JPH07197354A (en) | Production of knit fabric |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |