CN105624873A - Polytetrafluoroethylene (PTFE) membrane crack short-fiber re-splitting method and device used for same - Google Patents
Polytetrafluoroethylene (PTFE) membrane crack short-fiber re-splitting method and device used for same Download PDFInfo
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- CN105624873A CN105624873A CN201610002733.8A CN201610002733A CN105624873A CN 105624873 A CN105624873 A CN 105624873A CN 201610002733 A CN201610002733 A CN 201610002733A CN 105624873 A CN105624873 A CN 105624873A
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- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/18—Separating or spreading
Abstract
The invention relates to a polytetrafluoroethylene (PTFE) membrane crack short-fiber re-splitting method and a device used for the same. The method comprises the steps of merging conventional PTFE membrane crack fiber bundles, then continuously feeding a drum-type spunlace unit only provided with a spunlace head for twice successively, and enabling the merged fiber bundles to be wound on a drum in a spiral form for 6-20 circles along a Z direction for running so as to enable the fiber bundles to be impacted by spunlace for 12-40 times along the positive surface direction and the negative surface direction for splitting to obtain the PTFE membrane crack fiber bundles which are high in fine fiber number percentage and low in fiber branching rate. By adopting a flexible splitting technology, the prepared fiber bundles are not easily broken by tearing, and re-splitting can be continuously carried out at high speed. The improved drum-type spunlace splitting device has the characteristics of being compact in structure, simple in operation and convenient in process adjustment. The fiber bundles prepared by the method are evenly carded into a web after being cut off, thus being widely used for preparing high-temperature-resistant filter material with small porosity and high efficiency of dust removal.
Description
Technical field
The present invention relates to a kind of poly tetrafluoroethylene and split chopped fiber manufacture method and device thereof, especially relate to a kind of poly tetrafluoroethylene and split fiber opening method again and the device thereof of chopped fiber. The fine fibre number percent of chopped fiber is high, fiber branching rate is low to adopt the poly tetrafluoroethylene obtained by present invention fiber opening method again and device thereof to split, during for preparing filtrate, its combing speed is high, become net uniformly, the hole of made filtrate is little, porous nickel degree high, then can be widely used for the high temperature resistance filtration material of high efficiency of dust collection.
Background technology
Politef has physics and the chemical property of excellence, and fusing point is 327 DEG C, and decomposition temperature is more than 400 DEG C; High and low temperature resistance highlights, can continuous operation under-190 DEG C��260 DEG C environment; There is fabulous chemical resistance, except being dissolved in self fluoride and molten alkali metal, insoluble in other any chemical solvents; Good in oxidation resistance. It addition, politef has prominent surface not viscosity, in filter process, when dust and Teflon filtration material, filter material surface will not be gathered in, possess self-cleaning function, be the ideal material of corrosion-proof high-temp filtration. But, owing to polytetrafluoroethylmaterial material has the characteristic without liquefaction molten condition, " melt spinning method " of routine therefore cannot be used efficiently to prepare this fiber. At present, polytef flocks is typically with preparing with patent ZL201010558729.2 " film splits method " technique being representative. So-called " film splits method " technique is by pulverous politef raw material, by noting pressure, rolls film, sintering, the operation such as drawing-off forms film strips, makes fibre bundle after then film strips being carried out mechanical disintegration fibrillation, then through curling, sizing, cut off operation, obtain poly tetrafluoroethylene and split chopped fiber. Being that politef film strips is first broken into fishing net shaped owing to film splits chopped fiber, then be made up of combing pinwheel combing fibrillation bunchy, therefore, film splits the characteristic trait of chopped fiber and is: 1. in flat pattern, cross section is irregular polygon; 2. fiber linear density maximum can reach 15dtex, and minima is 0.5dtex, and average linear density is more than 3.2dtex, and line density CV value is more than 50%; 3. the fiber of more than 70% is the fiber with branching, and namely fiber branching rate is more than 70%. Above-mentioned poly tetrafluoroethylene splits chopped fiber when for preparing high temperature resistance filtration material, owing to its average linear density is relatively big, causes filtrate average pore size relatively big, is unfavorable for improving filter efficiency; Owing to its line density CV value and fiber branching rate are big, cause again its combing difficulty, cause into the defects such as net is irregular, finally affect the filter effect of filtrate.
In order to overcome above-mentioned poly tetrafluoroethylene to split the defect of chopped fiber, people have done again substantial amounts of research: as patent ZL201310423233.8 discloses a kind of polytetrafluoroethylsuperfine superfine fiber, it splits on the basis of method Technology at conventional film, also adopt the multiple technologies means such as thin for its film strips thickness tune, the encryption of combing pinwheel card wire, combing speed quickening, make the polytetrafluoroethylene fibre of below 1.5dtex line density. But, owing to film strips is scratched fibrillation effect by the card wire on combing pinwheel, it it is the mechanism of a kind of rigidity, in this case, also improve its card wire arranging density and the rotating speed of quickening combing pinwheel simultaneously, then the effect that the rigidity of film strips is scratched of its card wire can only be made more to strengthen, it is more easy to the tow tear fracture after scoring a goal, causes that end breakage rate increases and cannot continuously perform fibrillation again. Additionally, frame for movement, combing pinwheel is a revolving meber, then its length of effect of scratching of film strips is limited by its card wire, cause that in film strips, fiber major part still remains branching structure, its fiber branching rate still above 70%, then still suffers from when making to prepare high temperature resistance filtration material being unfavorable for that combing uniformly becomes net, finally affects the defect of its media filtration effect.
Therefore, improve poly tetrafluoroethylene and split fine fibre percentage composition in fiber, reduce fiber branching rate, reduce tow tear fracture phenomenon in the course of processing, be still the key issue that current polytetrafluoroethylene fibre industry needs to solve.
Summary of the invention
It is an object of the invention to provide a kind of poly tetrafluoroethylene and split chopped fiber tow fiber opening method again, to solve to adopt the poly tetrafluoroethylene made by prior art to split, chopped fiber fine fibre number percent is low, fiber branching rate high, and existing highly dense pinwheel High speed Carding fibrillation technology, be easily caused tow fracture and cannot quantity-produced defect. the present invention be adopt conventional film to split the poly tetrafluoroethylene made by method to split fibre bundle be raw material, through and feed the rotary drum spun lacing device of improvement again after closing, achieve the manufacture method that poly tetrafluoroethylene is split the refinement of chopped fiber fibrillation again, namely also plying Shu Xianhou is continuously fed into rotary drum spun lacing unit totally for twice, and make and plying bundle be 6��20 circle " Z " to spiral form be wrapped on rotary drum run, make its tow from instead, front surface both direction is impacted fibrillation by 12��40 spun lacing altogether, then through curling, sizing, it is high that the normal process steps such as cut-out make fine fibre number percent, the poly tetrafluoroethylene that fiber branching rate is low splits chopped fiber, its carding is uniform, it is widely used in that to prepare hole little, the high temperature resistance filtration material that efficiency of dust collection is high.
It is a further object to provide a kind of device splitting chopped fiber fiber opening method again for poly tetrafluoroethylene, i.e. the rotary drum spun lacing device of a kind of improvement. Owing to this device is the flexible fibrillation technology adopting water jet bump, instead of the rigidity fibrillation technology of existing high speed card wire combing, therefore, made tow not easily tear fracture, can at a high speed, be continued for fibrillation again. This device has the features such as compact conformation, simple to operate, process adjustments is convenient.
This invention address that the technical scheme that technical problem adopts:
A kind of poly tetrafluoroethylene splits the method for chopped fiber fibrillation again, it is adopt film routinely to split the poly tetrafluoroethylene obtained by method to split fibre bundle for nascent tow, again by its nascent tow of 10��35 bundle and synthesize one tow, fibrillation again is carried out by feeding the rotary drum spun lacing device improved, namely the tow and after conjunction first feeds the first rotary drum spun lacing unit being provided only with water jet parts, make tow with 6��20 enclose " Z " to helical form, anti-surface form outside, be wrapped on its rotary drum parts run; Then tow feeding is provided only with the second rotary drum spun lacing unit of water jet parts through deflector roll parts again, tow with 6��20 enclose " Z " to helical form, front surface form outside, it is wrapped on its rotary drum parts and runs, then making its tow from positive and negative surface both direction altogether by 12��40 water jets impact fibrillation again, in tow, fiber is refined further; Through fibrillation again and and tow output after, make fine fibre number percent height then through the normal process steps such as curling, sizing, cut-out, poly tetrafluoroethylene that fiber branching rate is low splits chopped fiber, concrete technology step is as follows:
And close (A)
First by polytetrafluoroethyldispersion dispersion resin, film splits the poly tetrafluoroethylene that the technique of method prepares and splits fibre bundle for nascent tow routinely, again it 10��35 is restrainted and closes, formed a beam width be 15��50 millimeters, thickness be that the poly tetrafluoroethylene of 1.5��5 millimeters splits fiber and closes nascent tow; After testing, in its tow, the width fiber number percentage ratio less than 10 microns is 18.6��21.6%, width is the fiber number percentage ratio of 10��30 microns is 36.6��38.6%, and the width fiber number percentage ratio more than 30 microns is 41.8��42.8%, and fiber branching rate is 72��78%;
(B) first rotary drum spun lacing impacts fibrillation
The poly tetrafluoroethylene of step (A) gained is split fiber and closes nascent tow, clamp through a pair rubber feeding roller parts, feed from the driving side of first rotary drum spun lacing unit and frame side, and make tow with 6��20 enclose " Z " to helical form, anti-surface form outside, it is wrapped on the rotary drum parts of the first rotary drum spun lacing unit being provided only with water jet parts and runs, make the anti-surface direction of its tow by 6��20 water jets impact, in tow flat fiber divide under water jets impact effect, fibrillation; The extruding of the another rubber roller by setting up in first rotary drum spun lacing unit, under combined effect with the internal suction of the rotary drum parts being provided with, eliminating moisture content contained in tow, making tow absorb the impact energy of water jet better, thus improving the thinning effect of fibrillation;
(C) second rotary drum spun lacing impacts fibrillation
The also plying bundle that fibrillation is obtained will be impacted through the first rotary drum spun lacing of above-mentioned steps (B), through deflector roll parts, feed from the fore side of second rotary drum spun lacing unit, and make tow with 6��20 enclose " Z " to helical form, front surface form outside, it is wrapped on the rotary drum parts of the second rotary drum spun lacing unit being provided only with water jet parts and runs, make the front surface direction of its tow by 6��20 water jets impact, flat fiber division further, fibrillation under water jets impact effect in tow; The extruding of the another rubber roller by setting up in second rotary drum spun lacing unit, under the combined effect with the internal suction of the rotary drum parts being provided with, eliminates moisture content contained in tow, thus improving the thinning effect of fibrillation further; Then, also exporting by a pair rubber outlet roller parts clamping with tow through fibrillation again, prepare poly tetrafluoroethylene then through the normal process steps such as curling, sizing, cut-out and split chopped fiber, after testing, in its chopped fiber, the width fiber number percentage ratio less than 10 microns increases to 38��42%, the fiber number percentage ratio that width is 10��30 microns increases to 51��54%, and the width fiber number percentage ratio more than 30 microns is reduced to 7��8%, and fiber branching rate is reduced to 40��50%.
A pair described rubber feeding roller parts are made up of upper rubber feeding roller and lower rubber feeding roller, the linear resonance surface velocity of upper rubber feeding roller and lower rubber feeding roller is 3��10 ms/min, upper rubber feeding roller rotates counterclockwise, and lower rubber feeding roller is clockwise pivoted.
In described first rotary drum spun lacing unit, distance between its water jet parts and its rotary drum parts is 10��20 millimeters, the hydraulic pressure of its water jet parts is 2.5��20 MPas, the diameter of the water jet from top to bottom ejected is 0.08��0.13 millimeter, and its arranging density is 14��16/centimetre; The vacuum of its rotary drum components interior is 13��37 kPas; The linear resonance surface velocity of the rotary drum of its rotary drum parts is 3.3��11 ms/min, and it rotates counterclockwise; Its rubber roller set up is clockwise pivoted, and and line pressure between the rotary drum of its rotary drum parts be 10��30 newton/centimetre.
Described deflector roll parts are to be driven by tow, and it rotates counterclockwise.
In described second rotary drum spun lacing unit, distance between its water jet parts and its rotary drum parts is 10��20 millimeters, the hydraulic pressure of its water jet parts is 2.8��22 MPas, the diameter of the water jet from bottom to top ejected is 0.08��0.13 millimeter, and its arranging density is 14��16/centimetre; The vacuum of its rotary drum components interior is 15��39 kPas; The linear resonance surface velocity of the rotary drum of its rotary drum parts is 3.5��12.1 ms/min, and it is clockwise pivoted; Its rubber roller set up rotates counterclockwise, and and line pressure between the rotary drum of its rotary drum parts be 10��30 newton/centimetre.
A pair described rubber outlet roller parts are made up of upper rubber outlet roller and lower rubber outlet roller, the linear resonance surface velocity of upper rubber outlet roller and lower rubber outlet roller is 3.8��13.2 ms/min, upper rubber outlet roller rotates counterclockwise, and lower rubber outlet roller is clockwise pivoted.
A kind of device splitting chopped fiber fiber opening method again for poly tetrafluoroethylene, namely the rotary drum spun lacing device improved, including the parts of the frame of conventional structure, transmission, control and plumbing, also include a pair rubber feeding roller parts, first rotary drum spun lacing unit, deflector roll parts, second rotary drum spun lacing unit, a pair rubber outlet roller parts;
A. a pair described rubber feeding roller parts are made up of all rubber-coated upper rubber feeding roller in surface and lower rubber feeding roller;
B. described first rotary drum spun lacing unit is made up of water jet parts, rotary drum parts and the root rubber pressure roller set up, wherein, described water jet parts and rotary drum parts all adopt the technical pattern of conventional nonwoven rotary drum spun-laced machine, described in the rubber roller set up be made up of the steel rider of Surface coating rubber;
C. described deflector roll parts are made up of a cylindrical roller of rustless steel;
D. described second rotary drum spun lacing unit is made up of water jet parts, rotary drum parts and the root rubber pressure roller set up, wherein, described water jet parts and rotary drum parts all adopt the technical pattern of conventional nonwoven rotary drum spun-laced machine, described in the rubber roller set up be made up of the steel rider of Surface coating rubber;
E. a pair described rubber outlet roller parts are made up of all rubber-coated upper rubber outlet roller in surface and lower rubber outlet roller;
Above-mentioned parts all adopt routine techniques to be that horizontal boom beam-like is arranged on outside frame, and its transmission, control and plumbing parts are arranged on inside frame;
Connection and the driving of above-mentioned parts particularly as follows:
A pair described rubber feeding roller parts are in the front of first rotary drum spun lacing unit, and it adopts routine techniques variable speed drives, described first rotary drum spun lacing unit is between a pair rubber feeding roller parts and deflector roll parts, its unit is to be followed successively by water jet parts by putting in order from top to bottom, three parts of rotary drum parts and rubber roller are formed, namely described water jet parts are just being placed in the top of rotary drum parts, described rotary drum parts are between water jet parts and rubber roller, the drum set of described rotary drum parts adopts routine techniques variable speed drives, the described rubber roller set up is positioned at the underface of rotary drum parts, and the drum being pressed on described rotary drum parts puts, and driven by drum set, described deflector roll parts are between first rotary drum spun lacing unit and second rotary drum spun lacing unit, and it is driven by tow, described second rotary drum spun lacing unit is between deflector roll parts and a pair rubber outlet roller parts, its unit is to be followed successively by rubber roller by putting in order from top to bottom, three parts of rotary drum parts and water jet parts are formed, namely the rubber roller set up described in is positioned at the surface of rotary drum parts, and the drum being pressed on rotary drum parts puts, and driven by drum set, described rotary drum parts are between water jet parts and rubber roller, the drum set of described rotary drum parts adopts routine techniques variable speed drives, described water jet parts are inverted in the lower section of rotary drum parts, a pair described rubber outlet roller parts are in the rear of second rotary drum spun lacing unit, and it adopts routine techniques variable speed drives,
The upper rubber feeding roller of a pair described rubber feeding roller parts and lower rubber feeding roller, its diameter be 100 millimeters, length be 200 millimeters, the level height of the jaw that upper rubber feeding roller and lower rubber feeding roller are constituted is fixed as 600mm, and apart for 300mm between first rotary drum spun lacing unit, in described first rotary drum spun lacing unit, its water jet parts are by the water jet body adopting routine techniques and structure, water spray plate, sealing ring, water spray plate pressing plate is formed, its profile is rectangle cuboid, working width is 300mm, it adopts routine techniques to regulate its setting height(from bottom), the outlet level height of the hole for water spraying of described water spray plate is 910��920mm, the central horizontal height of described rotary drum parts is fixed as 750mm, rotary drum parts are by the fixation hollow axle adopting routine techniques and structure, sealing member and drum set are formed, its drum set outer layer is rustless steel steel wire plain weave web frame, the order number of its mesh grid is 70��100 orders, the external diameter of its drum set is 300 millimeters, length is 400 millimeters, working width is 300mm, the diameter of the described rubber roller set up is 70 millimeters, length is 400 millimeters.
The cylindrical roller of rustless steel of described deflector roll parts, its diameter is 100 millimeters, length is 400 millimeters, its bottom surface level height is fixed as 600mm, it is between first rotary drum spun lacing unit and second rotary drum spun lacing unit, and all at a distance of 300mm respectively and between first rotary drum spun lacing unit and second rotary drum spun lacing unit, in described second rotary drum spun lacing unit, its water jet parts are by the water jet body adopting routine techniques and structure, water spray plate, sealing ring, water spray plate pressing plate is formed, its profile is rectangle cuboid, working width is 300mm, it adopts routine techniques to regulate its setting height(from bottom), the outlet level height of the hole for water spraying of described water spray plate is 580��590mm, the central horizontal height of described rotary drum parts is fixed as 750mm, rotary drum parts are by the fixation hollow axle adopting routine techniques and structure, sealing member and drum set are formed, its drum set outer layer is rustless steel steel wire plain weave web frame, the order number of its mesh grid is 70��100 orders, the external diameter of its drum set is 300 millimeters, length is 400 millimeters, working width is 300mm, the diameter of the described rubber roller set up is 70 millimeters, length is 400 millimeters, the upper rubber outlet roller of a pair described rubber outlet roller parts and lower rubber outlet roller, its diameter be 100 millimeters, length be 200 millimeters, the level height of the jaw that upper rubber outlet roller and lower rubber outlet roller are constituted is fixed as 900mm, it is positioned at the rear of second rotary drum spun lacing unit, and at a distance of 300mm.
Compared with prior art, advantages of the present invention is as follows:
1, present invention employs rotary drum spun lacing fibrillation technology again, open spun lacing technology first and split the manufacture method of fiber for poly tetrafluoroethylene, conventional film splits the poly tetrafluoroethylene made by law technology, and to split fibre bundle fine fibre number percent low, the defect that fiber branching rate is high, namely adopt through and the conventional film that closes split the poly tetrafluoroethylene made by method to split fibre bundle be raw material, successively it is continuously fed into rotary drum spun lacing unit for twice totally, and make and plying bundle be 6��20 circle " Z " to spiral form be wrapped on rotary drum run, make its tow from instead, front surface both direction is impacted fibrillation by 12��40 spun lacing altogether, prepare fine fibre number percent high, the poly tetrafluoroethylene that fiber branching rate is low splits fibre bundle, split compared with the tow that pinwheel fiber opening process prepares with conventional film, in the tow that the present invention prepares, its width fiber number less than 10 microns increases to 38��42% from 18.6��21.6%, the fiber number percentage ratio that width is 10��30 microns increases to 51��54% from 36.6��38.6%, the width fiber number more than 30 microns is reduced to 4��11% from 41.8��42.8%, its fiber branching rate is reduced to 40��50% from 72��78%.
2, present invention provide for poly tetrafluoroethylene and split the rotary drum spun lacing fiber-opening apparatus of fibre bundle fibrillation again, achieve the flexible fibrillation technology adopting water jet bump first, instead of the rigidity fibrillation technology of existing high speed card wire combing, therefore, made tow not easily tear fracture, can at a high speed, be continued for fibrillation again. Additionally, this device rotary drum spun lacing unit is only with a water jet, it is achieved that the refinement purpose of the repeat impact fibrillation to tow, there is the features such as compact conformation, simple to operate, process adjustments is convenient. The poly tetrafluoroethylene adopting this device fibrillation again splits fibre bundle, and after cut-out, carding is uniform, and made filtrate hole is little, filtering accuracy is high, can be widely used for preparing the high temperature resistance filtration material of high efficiency of dust collection.
Accompanying drawing explanation
Fig. 1 is the present invention plying bundle fibrillation operating diagram again;
In Fig. 1, 1-frame, 2-rubber feeding roller parts, the upper rubber feeding roller of 21-, rubber feeding roller under 22-, 3-first rotary drum spun lacing unit, the water jet parts of 31-first rotary drum spun lacing unit, the rotary drum parts of 32-first rotary drum spun lacing unit, the rubber roller of 33-first rotary drum spun lacing unit, 4-deflector roll parts, 5-second rotary drum spun lacing unit, the rubber roller of 51-second rotary drum spun lacing unit, the rotary drum parts of 52-second rotary drum spun lacing unit, the water jet parts of 53-second rotary drum spun lacing unit, 6-rubber outlet roller parts, the upper rubber outlet roller of 61-, rubber outlet roller under 62-, 7-is through the also plying bundle of fibrillation again.
Detailed description of the invention
Further describe below in conjunction with specific embodiments and the drawings 1. Should be understood that these embodiments are merely to illustrate the present invention rather than restriction the scope of the present invention. In addition, it is to be understood that after having read the content that the present invention lectures, the present invention can be made various change and amendment by those skilled in the art, and these equivalent form of values fall within the application appended claims limited range equally.
A kind of poly tetrafluoroethylene splits chopped fiber fiber opening method again, it is adopt film routinely to split the poly tetrafluoroethylene obtained by method to split fibre bundle for nascent tow, again by its nascent tow of 10��35 bundle and synthesize one tow, fibrillation again is carried out by feeding the rotary drum spun lacing device improved, namely the tow and after conjunction first feeds the first rotary drum spun lacing unit 3 being provided only with water jet parts 31, make tow with 6��20 enclose " Z " to helical form, anti-surface form outside, be wrapped on its rotary drum parts 32 run; Then tow feeding is provided only with the second rotary drum spun lacing unit 5 of water jet parts 53 through deflector roll parts 4 again, tow with 6��20 enclose " Z " to helical form, front surface form outside, it is wrapped on its rotary drum parts 52 and runs, then making its tow from positive and negative surface both direction altogether by 12��40 water jets impact fibrillation again, in tow, fiber is refined further; Through fibrillation again and and tow 7 output after, make fine fibre number percent height then through the normal process steps such as curling, sizing, cut-out, poly tetrafluoroethylene that fiber branching rate is low splits chopped fiber, concrete technology step is as follows:
And close (A)
First by polytetrafluoroethyldispersion dispersion resin, film splits the poly tetrafluoroethylene that the technique of method prepares and splits fibre bundle for nascent tow routinely, again it 10��35 is restrainted and closes, formed a beam width be 15��50 millimeters, thickness be that the poly tetrafluoroethylene of 1.5��5 millimeters splits fiber and closes nascent tow; After testing, in its tow, the width fiber number percentage ratio less than 10 microns is 18.6��21.6%, width is the fiber number percentage ratio of 10��30 microns is 36.6��38.6%, and the width fiber number percentage ratio more than 30 microns is 41.8��42.8%, and fiber branching rate is 72��78%.
(B) first rotary drum spun lacing impacts fibrillation
The poly tetrafluoroethylene of step (A) gained is split fiber and closes nascent tow, clamp through a pair rubber feeding roller parts 2, feed from the driving side of first rotary drum spun lacing unit 3 and frame 1 side, and make tow with 6��20 enclose " Z " to helical form, anti-surface form outside, it is wrapped on the rotary drum parts 32 of the first rotary drum spun lacing unit 3 being provided only with water jet parts 31 and runs, make the anti-surface direction of its tow by 6��20 water jets impact, in tow flat fiber divide under water jets impact effect, fibrillation; The extruding of the another rubber roller 33 by setting up in first rotary drum spun lacing unit 3, under combined effect with the internal suction of the rotary drum parts 32 being provided with, eliminating moisture content contained in tow, making tow absorb the impact energy of water jet better, thus improving the thinning effect of fibrillation.
(C) second rotary drum spun lacing impacts fibrillation
The also plying bundle that fibrillation is obtained will be impacted through the first rotary drum spun lacing of above-mentioned steps (B), through deflector roll parts 4, feed from the fore side of second rotary drum spun lacing unit 5, and make tow with 6��20 enclose " Z " to helical form, front surface form outside, it is wrapped on the rotary drum parts 52 of the second rotary drum spun lacing unit 5 being provided only with water jet parts 53 and runs, make the front surface direction of its tow by 6��20 water jets impact, flat fiber division further, fibrillation under water jets impact effect in tow; The extruding of the another rubber roller 51 by setting up in second rotary drum spun lacing unit 5, under the combined effect with the internal suction of the rotary drum parts 52 being provided with, eliminates moisture content contained in tow, thus improving the thinning effect of fibrillation further; Then, through fibrillation again and and tow 7 clamped output by a pair rubber outlet roller parts 6, prepare poly tetrafluoroethylene then through the normal process steps such as curling, sizing, cut-out and split chopped fiber, after testing, in its chopped fiber, the width fiber number percentage ratio less than 10 microns increases to 38��42%, the fiber number percentage ratio that width is 10��30 microns increases to 51��54%, and the width fiber number percentage ratio more than 30 microns is reduced to 7��8%, and fiber branching rate is reduced to 40��50%.
A pair described rubber feeding roller parts 2 are made up of upper rubber feeding roller 21 and lower rubber feeding roller 22, the linear resonance surface velocity of upper rubber feeding roller 21 and lower rubber feeding roller 22 is 3��10 ms/min, upper rubber feeding roller 21 rotates counterclockwise, and lower rubber feeding roller 22 is clockwise pivoted.
In described first rotary drum spun lacing unit 3, distance between its water jet parts 31 and its rotary drum parts 32 is 10��20 millimeters, the hydraulic pressure of its water jet parts 31 is 2.5��20 MPas, the diameter of the water jet from top to bottom ejected is 0.08��0.13 millimeter, and its arranging density is 14��16/centimetre; Its vacuum within rotary drum parts 32 is 13��37 kPas; The linear resonance surface velocity of the rotary drum of its rotary drum parts 32 is 3.3��11 ms/min, and it rotates counterclockwise; The rubber roller 33 that it is set up is clockwise pivoted, and and line pressure between the rotary drum of its rotary drum parts 32 be 10��30 newton/centimetre.
Described deflector roll parts 4 are to be driven by tow, and it rotates counterclockwise.
In described second rotary drum spun lacing unit 5, distance between its water jet parts 53 and its rotary drum parts 52 is 10��20 millimeters, the hydraulic pressure of its water jet parts 53 is 2.8��22 MPas, the diameter of the water jet from bottom to top ejected is 0.08��0.13 millimeter, and its arranging density is 14��16/centimetre; Its vacuum within rotary drum parts 52 is 15��39 kPas; The linear resonance surface velocity of the rotary drum of its rotary drum parts 52 is 3.5��12.1 ms/min, and it is clockwise pivoted; The rubber roller 51 that it is set up rotates counterclockwise, and and line pressure between the rotary drum of its rotary drum parts 52 be 10��30 newton/centimetre.
A pair described rubber outlet roller parts 6 are made up of upper rubber outlet roller 61 and lower rubber outlet roller 62, the linear resonance surface velocity of upper rubber outlet roller 61 and lower rubber outlet roller 62 is 3.8��13.2 ms/min, upper rubber outlet roller 61 rotates counterclockwise, and lower rubber outlet roller 62 is clockwise pivoted.
A kind of device splitting chopped fiber fiber opening method again for poly tetrafluoroethylene, namely the rotary drum spun lacing device improved, including the parts of the frame 1 of conventional structure, transmission, control and plumbing, also include a pair rubber feeding roller parts 2, first rotary drum spun lacing unit 3, deflector roll parts 4, second rotary drum spun lacing unit 5, a pair rubber outlet roller parts 6.
A. a pair described rubber feeding roller parts 2 are made up of all rubber-coated upper rubber feeding roller 21 in surface and lower rubber feeding roller 22.
B. described first rotary drum spun lacing unit 3 is made up of 31, rotary drum parts 32 of water jet parts and the root rubber pressure roller 33 set up, wherein, described water jet parts 31 and rotary drum parts 32 all adopt the technical pattern of conventional nonwoven rotary drum spun-laced machine, described in the rubber roller 33 set up be made up of the steel rider of Surface coating rubber.
C. described deflector roll parts 4 are made up of a cylindrical roller of rustless steel.
D. described second rotary drum spun lacing unit 5 is made up of 53, rotary drum parts 52 of water jet parts and the root rubber pressure roller 51 set up, wherein, described water jet parts 53 and rotary drum parts 52 all adopt the technical pattern of conventional nonwoven rotary drum spun-laced machine, described in the rubber roller 51 set up be made up of the steel rider of Surface coating rubber.
E. a pair described rubber outlet roller parts 6 are made up of all rubber-coated upper rubber outlet roller 61 in surface and lower rubber outlet roller 62.
Above-mentioned parts all adopt routine techniques to be that horizontal boom beam-like is arranged on outside frame 1, and its transmission, control and plumbing parts are arranged on inside frame 1;
Connection and the driving of above-mentioned parts particularly as follows:
A pair described rubber feeding roller parts 2 are in the front of first rotary drum spun lacing unit 3, and it adopts routine techniques variable speed drives, described first rotary drum spun lacing unit 3 is between a pair rubber feeding roller parts 2 and deflector roll parts 4, its unit is to be followed successively by water jet parts 31 by putting in order from top to bottom, three parts of rotary drum parts 32 and rubber roller 33 are formed, namely described water jet parts 31 are just being placed in the top of rotary drum parts 32, described rotary drum parts 32 are between water jet parts 31 and rubber roller 33, the drum set of described rotary drum parts 32 adopts routine techniques variable speed drives, the described rubber roller 33 set up is positioned at the underface of rotary drum parts 32, and the drum being pressed on described rotary drum parts 32 puts, and driven by drum set, described deflector roll parts 4 are between first rotary drum spun lacing unit 3 and second rotary drum spun lacing unit 5, and it is driven by tow, described second rotary drum spun lacing unit 5 is between deflector roll parts 4 and a pair rubber outlet roller parts 6, its unit is to be followed successively by rubber roller 51 by putting in order from top to bottom, three parts of rotary drum parts 52 and water jet parts 53 are formed, namely the rubber roller 51 set up described in is positioned at the surface of rotary drum parts 52, and the drum being pressed on rotary drum parts 52 puts, and driven by drum set, described rotary drum parts 52 are between water jet parts 53 and rubber roller 51, the drum set of described rotary drum parts 52 adopts routine techniques variable speed drives, described water jet parts 53 are inverted in the lower section of rotary drum parts 52, a pair described rubber outlet roller parts 6 are in the rear of second rotary drum spun lacing unit 5, and it adopts routine techniques variable speed drives.
The upper rubber feeding roller 21 of a pair described rubber feeding roller parts 2 and lower rubber feeding roller 22, its diameter be 100 millimeters, length be 200 millimeters, the level height of the jaw that upper rubber feeding roller 21 and lower rubber feeding roller 22 are constituted is fixed as 600mm, and apart for 300mm between first rotary drum spun lacing unit 3, in described first rotary drum spun lacing unit 3, its water jet parts 31 are by the water jet body adopting routine techniques and structure, water spray plate, sealing ring, water spray plate pressing plate is formed, its profile is rectangle cuboid, working width is 300mm, it adopts routine techniques to regulate its setting height(from bottom), the outlet level height of the hole for water spraying of described water spray plate is 910��920mm, the central horizontal height of described rotary drum parts 32 is fixed as 750mm, rotary drum parts 32 are by the fixation hollow axle adopting routine techniques and structure, sealing member and drum set are formed, its drum set outer layer is rustless steel steel wire plain weave web frame, the order number of its mesh grid is 70��100 orders, the external diameter of its drum set is 300 millimeters, length is 400 millimeters, working width is 300mm, the diameter of the described rubber roller 33 set up is 70 millimeters, length is 400 millimeters.
The cylindrical roller of rustless steel of described deflector roll parts 4, its diameter is 100 millimeters, length is 400 millimeters, its bottom surface level height is fixed as 600mm, it is between first rotary drum spun lacing unit 3 and second rotary drum spun lacing unit 5, and all at a distance of 300mm respectively and between first rotary drum spun lacing unit 3 and second rotary drum spun lacing unit 5, in described second rotary drum spun lacing unit 5, its water jet parts 53 are by the water jet body adopting routine techniques and structure, water spray plate, sealing ring, water spray plate pressing plate is formed, its profile is rectangle cuboid, working width is 300mm, it adopts routine techniques to regulate its setting height(from bottom), the outlet level height of the hole for water spraying of described water spray plate is 580��590mm, the central horizontal height of described rotary drum parts 52 is fixed as 750mm, rotary drum parts 52 are by the fixation hollow axle adopting routine techniques and structure, sealing member and drum set are formed, its drum set outer layer is rustless steel steel wire plain weave web frame, the order number of its mesh grid is 70��100 orders, the external diameter of its drum set is 300 millimeters, length is 400 millimeters, working width is 300mm, the diameter of the described rubber roller 51 set up is 70 millimeters, length is 400 millimeters, the upper rubber outlet roller 61 of a pair described rubber outlet roller parts 6 and lower rubber outlet roller 62, its diameter be 100 millimeters, length be 200 millimeters, the level height of the jaw that upper rubber outlet roller 61 and lower rubber outlet roller 62 are constituted is fixed as 900mm, it is positioned at the rear of second rotary drum spun lacing unit 5, and at a distance of 300mm.
As shown in Figure 1, a kind of poly tetrafluoroethylene splits the workflow of chopped fiber fiber opening method again: be adopt film routinely to split the poly tetrafluoroethylene obtained by method to split fibre bundle for nascent tow, again by its nascent tow of 10��35 bundle and synthesize one tow, by rubber feeding roller parts 2 by and close after tow first feed the first rotary drum spun lacing unit 3 being provided only with water jet parts 31, make tow with 6��20 enclose " Z " to helical form, anti-surface form outside, it is wrapped on its rotary drum parts 32 and runs, its tow is made to accept 6��20 water jets impact fibrillation again from anti-surface direction, then, tow feeding is provided only with the second rotary drum spun lacing unit 5 of water jet parts 53 through deflector roll parts 4 again, tow with 6��20 enclose " Z " to helical form, front surface form outside, it is wrapped on its rotary drum parts 52 and runs, its tow is then made again to accept 6��20 water jets impact fibrillation again from front surface direction, in tow, fiber is refined further, export through rubber outlet roller parts 6 after, make the poly tetrafluoroethylene that fine fibre number percent is high, fiber branching rate is low, end breakage rate is low split fiber through fibrillation again and plying bundle 7.
Embodiment 1
Adopt film routinely split obtained by method be 6��140 microns by width, thickness be that the poly tetrafluoroethylene that the flat fiber of 10��30 microns is constituted splits fibre bundle for nascent tow, again by its nascent tow of 10 bundle and synthesize width be 15 millimeters, thickness be 1.5 millimeters one and and nascent tow, after testing, itself and and nascent tow in the width fiber number percentage ratio less than 10 microns be 18.6%, width is the fiber number percentage ratio of 10��30 microns is 36.6%, the width fiber number percentage ratio more than 30 microns is 41.8%, and fiber branching rate is 72%.
Rotated counterclockwise by upper rubber feeding roller 21, lower rubber feeding roller 22 is clockwise pivoted, by and close after tow, with the linear velocity of 10 ms/min, first feeding is provided only with the first rotary drum spun lacing unit 3 of water jet parts 31, make tow with 20 enclose " Z " to helical form, anti-surface form outside, it is wrapped on its rotary drum parts 32 and runs, its tow is made to accept 20 water jets impact fibrillation again from anti-surface direction, its technological parameter is particularly as follows: the distance between its water jet parts 31 and its rotary drum parts 32 is 20 millimeters, the hydraulic pressure of its water jet parts 31 is 2.5 MPas, the diameter of the water jet from top to bottom ejected is 0.08 millimeter, its arranging density is 14/centimetre, the vacuum within rotary drum parts 32 of described first rotary drum spun lacing unit 3 is 13 kPas, the linear resonance surface velocity of the rotary drum of the rotary drum parts 32 of described first rotary drum spun lacing unit 3 is 11 ms/min, and it rotates counterclockwise, the rubber roller 33 that described first rotary drum spun lacing unit 3 is set up is clockwise pivoted, the line pressure between the rotary drum of the rotary drum parts 32 of itself and first rotary drum spun lacing unit 3 be 10 newton/centimetre.
Then, the tow deflector roll parts 4 through rotating counterclockwise feed the second rotary drum spun lacing unit 5 being provided only with water jet parts 53 again, tow with 20 enclose " Z " to helical form, front surface form outside, it is wrapped on its rotary drum parts 52 and runs, its tow is then made again to accept 20 water jets impact fibrillation again from front surface direction, export through rubber outlet roller parts 6 after, make fine fibre number percent high, fiber branching rate is low, the poly tetrafluoroethylene that end breakage rate is low splits the also plying bundle 7 of fiber fibrillation again, its technological parameter is particularly as follows: described deflector roll parts 4 are to be driven by tow, it rotates counterclockwise, in described second rotary drum spun lacing unit 5, distance between its water jet parts 53 and its rotary drum parts 52 is 20 millimeters, the hydraulic pressure of its water jet parts 53 is 2.8 MPas, and the diameter of the water jet from bottom to top ejected is 0.08 millimeter, and its arranging density is 14/centimetre, the vacuum within rotary drum parts 52 of described second rotary drum spun lacing unit 5 is 15 kPas, the linear resonance surface velocity of the rotary drum of the rotary drum parts 52 of described second rotary drum spun lacing unit 5 is 12.1 ms/min, and it is clockwise pivoted, the rubber roller 51 that described second rotary drum spun lacing unit 5 is set up rotates counterclockwise, the line pressure between the rotary drum of the rotary drum parts 52 of itself and second rotary drum spun lacing unit 5 be 10 newton/centimetre, the upper rubber outlet roller 61 of a pair described rubber outlet roller parts 6 and the linear resonance surface velocity of lower rubber outlet roller 62 are 13.2 ms/min, and upper rubber outlet roller 61 rotates counterclockwise, and lower rubber outlet roller 62 is clockwise pivoted.
Through the positive and negative surface of above-mentioned tow, totally 40 spun lacing impact fibrillation, prepare the poly tetrafluoroethylene that fine fibre number percent is high, fiber branching rate is low, end breakage rate is low and split the also plying bundle 7 of fiber fibrillation again, after testing, its again fibrillation and plying bundle 7 in the width fiber number percentage ratio less than 10 microns increase to 42%, the fiber number percentage ratio that width is 10��30 microns increases to 51%, the width fiber number percentage ratio more than 30 microns is reduced to 7%, and fiber branching rate is reduced to 40%.
Embodiment 2
Adopt film routinely split obtained by method be 6��140 microns by width, thickness be that the poly tetrafluoroethylene that the flat fiber of 10��30 microns is constituted splits fibre bundle for nascent tow, again by its nascent tow of 22 bundle and synthesize width be 30 millimeters, thickness be 3 millimeters one and and nascent tow, after testing, itself and and nascent tow in the width fiber number percentage ratio less than 10 microns be 19.5%, width is the fiber number percentage ratio of 10��30 microns is 37.2%, the width fiber number percentage ratio more than 30 microns is 42.3%, and fiber branching rate is 75%.
Rotated counterclockwise by upper rubber feeding roller 21, lower rubber feeding roller 22 is clockwise pivoted, by and close after tow, with the linear velocity of 6.5 ms/min, first feeding is provided only with the first rotary drum spun lacing unit 3 of water jet parts 31, make tow with 10 enclose " Z " to helical form, anti-surface form outside, it is wrapped on its rotary drum parts 32 and runs, its tow is made to accept 10 water jets impact fibrillation again from anti-surface direction, its technological parameter is particularly as follows: the distance between its water jet parts 31 and its rotary drum parts 32 is 15 millimeters, the hydraulic pressure of its water jet parts 31 is 11 MPas, the diameter of the water jet from top to bottom ejected is 0.1 millimeter, its arranging density is 15/centimetre, the vacuum within rotary drum parts 32 of described first rotary drum spun lacing unit 3 is 25 kPas, the linear resonance surface velocity of the rotary drum of the rotary drum parts 32 of described first rotary drum spun lacing unit 3 is 7.1 ms/min, and it rotates counterclockwise, the rubber roller 33 that described first rotary drum spun lacing unit 3 is set up is clockwise pivoted, the line pressure between the rotary drum of the rotary drum parts 32 of itself and first rotary drum spun lacing unit 3 be 20 newton/centimetre.
Then, the tow deflector roll parts 4 through rotating counterclockwise feed the second rotary drum spun lacing unit 5 being provided only with water jet parts 53 again, tow with 10 enclose " Z " to helical form, front surface form outside, it is wrapped on its rotary drum parts 52 and runs, its tow is then made again to accept 10 water jets impact fibrillation again from front surface direction, export through rubber outlet roller parts 6 after, make fine fibre number percent high, fiber branching rate is low, the poly tetrafluoroethylene that end breakage rate is low splits the also plying bundle 7 of fiber fibrillation again, its technological parameter is particularly as follows: described deflector roll parts 4 are to be driven by tow, it rotates counterclockwise, in described second rotary drum spun lacing unit 5, distance between its water jet parts 53 and its rotary drum parts 52 is 15 millimeters, the hydraulic pressure of its water jet parts 53 is 12 MPas, and the diameter of the water jet from bottom to top ejected is 0.1 millimeter, and its arranging density is 15/centimetre, the vacuum within rotary drum parts 52 of described second rotary drum spun lacing unit 5 is 27 kPas, the linear resonance surface velocity of the rotary drum of the rotary drum parts 52 of described second rotary drum spun lacing unit 5 is 7.8 ms/min, and it is clockwise pivoted, the rubber roller 51 that described second rotary drum spun lacing unit 5 is set up rotates counterclockwise, the line pressure between the rotary drum of the rotary drum parts 52 of itself and second rotary drum spun lacing unit 5 be 20 newton/centimetre, the upper rubber outlet roller 61 of a pair described rubber outlet roller parts 6 and the linear resonance surface velocity of lower rubber outlet roller 62 are 8.6 ms/min, and upper rubber outlet roller 61 rotates counterclockwise, and lower rubber outlet roller 62 is clockwise pivoted.
Through the positive and negative surface of above-mentioned tow, totally 20 spun lacing impact fibrillation, prepare the poly tetrafluoroethylene that fine fibre number percent is high, fiber branching rate is low, end breakage rate is low and split the also plying bundle 7 of fiber fibrillation again, after testing, its again fibrillation and plying bundle 7 in the width fiber number percentage ratio less than 10 microns increase to 40%, the fiber number percentage ratio that width is 10��30 microns increases to 52.5%, the width fiber number percentage ratio more than 30 microns is reduced to 7.5%, and fiber branching rate is reduced to 45%.
Embodiment 3
Adopt film routinely split obtained by method be 6��140 microns by width, thickness be that the poly tetrafluoroethylene that the flat fiber of 10��30 microns is constituted splits fibre bundle for nascent tow, again by its nascent tow of 35 bundle and synthesize width be 50 millimeters, thickness be 5 millimeters one and and nascent tow, after testing, itself and and nascent tow in the width fiber number percentage ratio less than 10 microns be 21.6%, width is the fiber number percentage ratio of 10��30 microns is 38.6%, the width fiber number percentage ratio more than 30 microns is 42.8%, and fiber branching rate is 78%.
Rotated counterclockwise by upper rubber feeding roller 21, lower rubber feeding roller 22 is clockwise pivoted, by and close after tow, with the linear velocity of 3 ms/min, first feeding is provided only with the first rotary drum spun lacing unit 3 of water jet parts 31, make tow with 6 enclose " Z " to helical form, anti-surface form outside, it is wrapped on its rotary drum parts 32 and runs, its tow is made to accept 6 water jets impact fibrillation again from anti-surface direction, its technological parameter is particularly as follows: the distance between its water jet parts 31 and its rotary drum parts 32 is 10 millimeters, the hydraulic pressure of its water jet parts 31 is 20 MPas, the diameter of the water jet from top to bottom ejected is 0.13 millimeter, its arranging density is 16/centimetre, the vacuum within rotary drum parts 32 of described first rotary drum spun lacing unit 3 is 37 kPas, the linear resonance surface velocity of the rotary drum of the rotary drum parts 32 of described first rotary drum spun lacing unit 3 is 3.3 ms/min, and it rotates counterclockwise, the rubber roller 33 that described first rotary drum spun lacing unit 3 is set up is clockwise pivoted, the line pressure between the rotary drum of the rotary drum parts 32 of itself and first rotary drum spun lacing unit 3 be 30 newton/centimetre.
Then, the tow deflector roll parts 4 through rotating counterclockwise feed the second rotary drum spun lacing unit 5 being provided only with water jet parts 53 again, tow with 6 enclose " Z " to helical form, front surface form outside, it is wrapped on its rotary drum parts 52 and runs, its tow is then made again to accept 6 water jets impact fibrillation again from front surface direction, export through rubber outlet roller parts 6 after, make fine fibre number percent high, fiber branching rate is low, the poly tetrafluoroethylene that end breakage rate is low splits the also plying bundle 7 of fiber fibrillation again, its technological parameter is particularly as follows: described deflector roll parts 4 are to be driven by tow, it rotates counterclockwise, in described second rotary drum spun lacing unit 5, distance between its water jet parts 53 and its rotary drum parts 52 is 10 millimeters, the hydraulic pressure of its water jet parts 53 is 22 MPas, and the diameter of the water jet from bottom to top ejected is 0.13 millimeter, and its arranging density is 16/centimetre, the vacuum within rotary drum parts 52 of described second rotary drum spun lacing unit 5 is 39 kPas, the linear resonance surface velocity of the rotary drum of the rotary drum parts 52 of described second rotary drum spun lacing unit 5 is 3.5 ms/min, and it is clockwise pivoted, the rubber roller 51 that described second rotary drum spun lacing unit 5 is set up rotates counterclockwise, the line pressure between the rotary drum of the rotary drum parts 52 of itself and second rotary drum spun lacing unit 5 be 30 newton/centimetre, the upper rubber outlet roller 61 of a pair described rubber outlet roller parts 6 and the linear resonance surface velocity of lower rubber outlet roller 62 are 3.8 ms/min, and upper rubber outlet roller 61 rotates counterclockwise, and lower rubber outlet roller 62 is clockwise pivoted.
Through the positive and negative surface of above-mentioned tow, totally 12 spun lacing impact fibrillation, prepare the poly tetrafluoroethylene that fine fibre number percent is high, fiber branching rate is low, end breakage rate is low and split the also plying bundle 7 of fiber fibrillation again, after testing, its again fibrillation and plying bundle 7 in the width fiber number percentage ratio less than 10 microns increase to 38%, the fiber number percentage ratio that width is 10��30 microns increases to 54%, the width fiber number percentage ratio more than 30 microns is reduced to 8%, and fiber branching rate is reduced to 50%.
Claims (9)
1. a poly tetrafluoroethylene splits chopped fiber fiber opening method again, it is characterized in that: be adopt film routinely to split the poly tetrafluoroethylene obtained by method to split fibre bundle for nascent tow, again by its nascent tow of 10��35 bundle and synthesize one tow, fibrillation again is carried out by feeding the rotary drum spun lacing device improved, namely the tow and after conjunction first feeds first rotary drum spun lacing unit (3) being provided only with a water jet parts (31), make tow with 6��20 enclose " Z " to helical form, anti-surface form outside, be wrapped in that its rotary drum parts (32) are upper to be run; Then tow feeding is provided only with second rotary drum spun lacing unit (5) of a water jet parts (53) through deflector roll parts (4) again, tow with 6��20 enclose " Z " to helical form, front surface form outside, it is wrapped in the upper operation of its rotary drum parts (52), then making its tow from positive and negative surface both direction altogether by 12��40 water jets impact fibrillation again, in tow, fiber is refined further; Through fibrillation again and and tow (7) output after, make fine fibre number percent height then through the normal process steps such as curling, sizing, cut-out, poly tetrafluoroethylene that fiber branching rate is low splits chopped fiber, concrete technology step is as follows:
And close (A)
First by polytetrafluoroethyldispersion dispersion resin, film splits the poly tetrafluoroethylene that the technique of method prepares and splits fibre bundle for nascent tow routinely, again it 10��35 is restrainted and closes, formed a beam width be 15��50 millimeters, thickness be that the poly tetrafluoroethylene of 1.5��5 millimeters splits fiber and closes nascent tow; After testing, in its tow, the width fiber number percentage ratio less than 10 microns is 18.6��21.6%, width is the fiber number percentage ratio of 10��30 microns is 36.6��38.6%, and the width fiber number percentage ratio more than 30 microns is 41.8��42.8%, and fiber branching rate is 72��78%;
(B) first rotary drum spun lacing impacts fibrillation
The poly tetrafluoroethylene of step (A) gained is split fiber and closes nascent tow, clamp through a pair rubber feeding roller parts (2), feed from the driving side of first rotary drum spun lacing unit (3) and frame (1) side, and make tow with 6��20 enclose " Z " to helical form, anti-surface form outside, it is wrapped in the upper operation of rotary drum parts (32) of first rotary drum spun lacing unit (3) being provided only with a water jet parts (31), make the anti-surface direction of its tow by 6��20 water jets impact, in tow, flat fiber divides under water jets impact effect, fibrillation, the extruding of the another rubber roller (33) by setting up in first rotary drum spun lacing unit (3), under combined effect with the internal suction of the rotary drum parts (32) being provided with, eliminate moisture content contained in tow, tow is made to absorb the impact energy of water jet better, thus improving the thinning effect of fibrillation,
(C) second rotary drum spun lacing impacts fibrillation
The also plying bundle that fibrillation is obtained will be impacted through the first rotary drum spun lacing of above-mentioned steps (B), through deflector roll parts (4), feed from the fore side of second rotary drum spun lacing unit (5), and make tow with 6��20 enclose " Z " to helical form, front surface form outside, it is wrapped in the upper operation of rotary drum parts (52) of second rotary drum spun lacing unit (5) being provided only with a water jet parts (53), make the front surface direction of its tow by 6��20 water jets impact, flat fiber division further, fibrillation under water jets impact effect in tow; The extruding of the another rubber roller (51) by setting up in second rotary drum spun lacing unit (5), under combined effect with the internal suction of the rotary drum parts (52) being provided with, eliminate moisture content contained in tow, thus improving the thinning effect of fibrillation further; Then, also exporting by a pair rubber outlet roller parts (6) clamping with tow (7) through fibrillation again, prepare poly tetrafluoroethylene then through the normal process steps such as curling, sizing, cut-out and split chopped fiber, after testing, in its chopped fiber, the width fiber number percentage ratio less than 10 microns increases to 38��42%, the fiber number percentage ratio that width is 10��30 microns increases to 51��54%, and the width fiber number percentage ratio more than 30 microns is reduced to 7��8%, and fiber branching rate is reduced to 40��50%.
2. poly tetrafluoroethylene as claimed in claim 1 splits chopped fiber fiber opening method again, it is characterized in that: a pair described rubber feeding roller parts (2) is made up of upper rubber feeding roller (21) and lower rubber feeding roller (22), the linear resonance surface velocity of upper rubber feeding roller (21) and lower rubber feeding roller (22) is 3��10 ms/min, upper rubber feeding roller (21) rotates counterclockwise, and lower rubber feeding roller (22) is clockwise pivoted.
3. poly tetrafluoroethylene as claimed in claim 1 splits chopped fiber fiber opening method again, it is characterized in that: in described first rotary drum spun lacing unit (3), distance between its water jet parts (31) and its rotary drum parts (32) is 10��20 millimeters, the hydraulic pressure of its water jet parts (31) is 2.5��20 MPas, the diameter of the water jet from top to bottom ejected is 0.08��0.13 millimeter, and its arranging density is 14��16/centimetre; The vacuum of its rotary drum parts (32) inside is 13��37 kPas; The linear resonance surface velocity of the rotary drum of its rotary drum parts (32) is 3.3��11 ms/min, and it rotates counterclockwise; Its rubber roller set up (33) is clockwise pivoted, and and line pressure between the rotary drum of its rotary drum parts (32) be 10��30 newton/centimetre.
4. poly tetrafluoroethylene as claimed in claim 1 splits chopped fiber fiber opening method again, it is characterised in that: described deflector roll parts (4) are to be driven by tow, and it rotates counterclockwise.
5. poly tetrafluoroethylene as claimed in claim 1 splits chopped fiber fiber opening method again, it is characterized in that: in described second rotary drum spun lacing unit (5), distance between its water jet parts (53) and its rotary drum parts (52) is 10��20 millimeters, the hydraulic pressure of its water jet parts (53) is 2.8��22 MPas, the diameter of the water jet from bottom to top ejected is 0.08��0.13 millimeter, and its arranging density is 14��16/centimetre; The vacuum of its rotary drum parts (52) inside is 15��39 kPas; The linear resonance surface velocity of the rotary drum of its rotary drum parts (52) is 3.5��12.1 ms/min, and it is clockwise pivoted; Its rubber roller set up (51) rotates counterclockwise, and and line pressure between the rotary drum of its rotary drum parts (52) be 10��30 newton/centimetre.
6. poly tetrafluoroethylene as claimed in claim 1 splits chopped fiber fiber opening method again, it is characterized in that: a pair described rubber outlet roller parts (6) is made up of upper rubber outlet roller (61) and lower rubber outlet roller (62), the linear resonance surface velocity of upper rubber outlet roller (61) and lower rubber outlet roller (62) is 3.8��13.2 ms/min, upper rubber outlet roller (61) rotates counterclockwise, and lower rubber outlet roller (62) is clockwise pivoted.
7. the device splitting chopped fiber fiber opening method again for poly tetrafluoroethylene, namely the rotary drum spun lacing device improved, parts including the frame (1) of conventional structure, transmission, control and plumbing, it is characterised in that: also include a pair rubber feeding roller parts (2), first rotary drum spun lacing unit (3), deflector roll parts (4), second rotary drum spun lacing unit (5), a pair rubber outlet roller parts (6);
A. a pair described rubber feeding roller parts (2) is made up of all rubber-coated upper rubber feeding roller (21) in surface and lower rubber feeding roller (22);
B. described first rotary drum spun lacing unit (3) is made up of a water jet parts (31), a rotary drum parts (32) and the root rubber pressure roller (33) set up, wherein, described water jet parts (31) and rotary drum parts (32) all adopt the technical pattern of conventional nonwoven rotary drum spun-laced machine, described in the rubber roller (33) set up be made up of the steel rider of Surface coating rubber;
C. described deflector roll parts (4) are made up of a cylindrical roller of rustless steel;
D. described second rotary drum spun lacing unit (5) is made up of a water jet parts (53), a rotary drum parts (52) and the root rubber pressure roller (51) set up, wherein, described water jet parts (53) and rotary drum parts (52) all adopt the technical pattern of conventional nonwoven rotary drum spun-laced machine, described in the rubber roller (51) set up be made up of the steel rider of Surface coating rubber;
E. a pair described rubber outlet roller parts (6) is made up of all rubber-coated upper rubber outlet roller (61) in surface and lower rubber outlet roller (62);
Above-mentioned parts all adopt routine techniques to be that horizontal boom beam-like is arranged on frame (1) outside, and its transmission, control and plumbing parts are arranged on frame (1) inner side;
Connection and the driving of above-mentioned parts particularly as follows:
A pair described rubber feeding roller parts (2) is in the front of first rotary drum spun lacing unit (3), and it adopts routine techniques variable speed drives, described first rotary drum spun lacing unit (3) is between a pair rubber feeding roller parts (2) and deflector roll parts (4), its unit is to be followed successively by water jet parts (31) by putting in order from top to bottom, three parts of rotary drum parts (32) and rubber roller (33) are formed, namely described water jet parts (31) are just being placed in the top of rotary drum parts (32), described rotary drum parts (32) are between water jet parts (31) and rubber roller (33), the drum set of described rotary drum parts (32) adopts routine techniques variable speed drives, the described rubber roller (33) set up is positioned at the underface of rotary drum parts (32), and the drum being pressed on described rotary drum parts (32) puts, and driven by drum set, described deflector roll parts (4) are between first rotary drum spun lacing unit (3) and second rotary drum spun lacing unit (5), and it is driven by tow, described second rotary drum spun lacing unit (5) is between deflector roll parts (4) and a pair rubber outlet roller parts (6), its unit is to be followed successively by rubber roller (51) by putting in order from top to bottom, three parts of rotary drum parts (52) and water jet parts (53) are formed, namely the rubber roller (51) set up described in is positioned at the surface of rotary drum parts (52), and the drum being pressed on rotary drum parts (52) puts, and driven by drum set, described rotary drum parts (52) are between water jet parts (53) and rubber roller (51), the drum set of described rotary drum parts (52) adopts routine techniques variable speed drives, described water jet parts (53) are inverted in the lower section of rotary drum parts (52), a pair described rubber outlet roller parts (6) is in the rear of second rotary drum spun lacing unit (5), and it adopts routine techniques variable speed drives.
8. the device splitting chopped fiber fiber opening method again for poly tetrafluoroethylene as claimed in claim 7, it is characterized in that: the upper rubber feeding roller (21) of a pair described rubber feeding roller parts (2) and lower rubber feeding roller (22), its diameter be 100 millimeters, length be 200 millimeters, the level height of the jaw that upper rubber feeding roller (21) and lower rubber feeding roller (22) are constituted is fixed as 600mm, and apart for 300mm between first rotary drum spun lacing unit (3), in described first rotary drum spun lacing unit (3), its water jet parts (31) are by the water jet body adopting routine techniques and structure, water spray plate, sealing ring, water spray plate pressing plate is formed, its profile is rectangle cuboid, working width is 300mm, it adopts routine techniques to regulate its setting height(from bottom), the outlet level height of the hole for water spraying of described water spray plate is 910��920mm, the central horizontal height of described rotary drum parts (32) is fixed as 750mm, rotary drum parts (32) are by the fixation hollow axle adopting routine techniques and structure, sealing member and drum set are formed, its drum set outer layer is rustless steel steel wire plain weave web frame, the order number of its mesh grid is 70��100 orders, the external diameter of its drum set is 300 millimeters, length is 400 millimeters, working width is 300mm, the diameter of the described rubber roller (33) set up is 70 millimeters, length is 400 millimeters.
9. the device splitting chopped fiber fiber opening method again for poly tetrafluoroethylene as claimed in claim 7, it is characterized in that: the cylindrical roller of rustless steel of described deflector roll parts (4), its diameter is 100 millimeters, length is 400 millimeters, its bottom surface level height is fixed as 600mm, it is positioned between first rotary drum spun lacing unit (3) and second rotary drum spun lacing unit (5), and all at a distance of 300mm respectively and between first rotary drum spun lacing unit (3) and second rotary drum spun lacing unit (5), in described second rotary drum spun lacing unit (5), its water jet parts (53) are by the water jet body adopting routine techniques and structure, water spray plate, sealing ring, water spray plate pressing plate is formed, its profile is rectangle cuboid, working width is 300mm, it adopts routine techniques to regulate its setting height(from bottom), the outlet level height of the hole for water spraying of described water spray plate is 580��590mm, the central horizontal height of described rotary drum parts (52) is fixed as 750mm, rotary drum parts (52) are by the fixation hollow axle adopting routine techniques and structure, sealing member and drum set are formed, its drum set outer layer is rustless steel steel wire plain weave web frame, the order number of its mesh grid is 70��100 orders, the external diameter of its drum set is 300 millimeters, length is 400 millimeters, working width is 300mm, the diameter of the described rubber roller (51) set up is 70 millimeters, length is 400 millimeters, the upper rubber outlet roller (61) of a pair described rubber outlet roller parts (6) and lower rubber outlet roller (62), its diameter be 100 millimeters, length be 200 millimeters, the level height of the jaw that upper rubber outlet roller (61) and lower rubber outlet roller (62) are constituted is fixed as 900mm, it is positioned at the rear of second rotary drum spun lacing unit (5), and at a distance of 300mm.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106757791A (en) * | 2016-12-30 | 2017-05-31 | 青岛大学 | Non-woven fabric and its preparation technology based on polytetrafluoroethylene film |
| CN106801292A (en) * | 2016-12-30 | 2017-06-06 | 青岛大学 | The spunlace non-woven cloth and its preparation technology of a kind of ultra high molecular weight polyethylene films |
| CN106835505A (en) * | 2016-12-30 | 2017-06-13 | 青岛大学 | Spunlace non-woven cloth and its preparation technology based on polytetrafluoro polyethylene film |
| CN108914232A (en) * | 2018-07-17 | 2018-11-30 | 江苏金由新材料有限公司 | A kind of preparation method of PTFE Down Fiber |
| CN110616526A (en) * | 2019-09-29 | 2019-12-27 | 德宏电子(苏州)有限公司 | Fiber opening process |
| US20210156054A1 (en) * | 2019-11-22 | 2021-05-27 | Industrial Technology Research Institute | Fiber spreading apparatus |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106757791A (en) * | 2016-12-30 | 2017-05-31 | 青岛大学 | Non-woven fabric and its preparation technology based on polytetrafluoroethylene film |
| CN106801292A (en) * | 2016-12-30 | 2017-06-06 | 青岛大学 | The spunlace non-woven cloth and its preparation technology of a kind of ultra high molecular weight polyethylene films |
| CN106835505A (en) * | 2016-12-30 | 2017-06-13 | 青岛大学 | Spunlace non-woven cloth and its preparation technology based on polytetrafluoro polyethylene film |
| CN106801292B (en) * | 2016-12-30 | 2019-09-24 | 青岛大学 | A kind of spunlace non-woven cloth and its preparation process of ultra high molecular weight polyethylene films |
| CN106835505B (en) * | 2016-12-30 | 2020-06-23 | 青岛大学 | Spunlace nonwoven fabric based on polytetrafluoroethylene membrane and preparation process thereof |
| CN106757791B (en) * | 2016-12-30 | 2021-09-03 | 青岛大学 | Novel non-woven fabric based on polytetrafluoroethylene film and preparation process thereof |
| CN108914232A (en) * | 2018-07-17 | 2018-11-30 | 江苏金由新材料有限公司 | A kind of preparation method of PTFE Down Fiber |
| CN110616526A (en) * | 2019-09-29 | 2019-12-27 | 德宏电子(苏州)有限公司 | Fiber opening process |
| US20210156054A1 (en) * | 2019-11-22 | 2021-05-27 | Industrial Technology Research Institute | Fiber spreading apparatus |
| US11519107B2 (en) * | 2019-11-22 | 2022-12-06 | Industrial Technology Research Institute | Fiber spreading apparatus |
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Effective date of registration: 20170911 Address after: 224412, Jiangsu County, Funing province Yancheng City County plate filter industry park D district and Hopewell Road No. 333 Co-patentee after: Donghua University Patentee after: Ling long new material technology Jiangsu Co., Ltd. Address before: 201299, 833, Shanghai, Chuansha, Pudong New Area new town, Sichuan Road Co-patentee before: Donghua University Patentee before: SHANGHAI LINFLON NEW MATERIAL TECHNOLOGY CO., LTD. |