CN1103383C - Parallel spinning assembly for composite two-component porous hollow fiber - Google Patents
Parallel spinning assembly for composite two-component porous hollow fiber Download PDFInfo
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- CN1103383C CN1103383C CN98111066A CN98111066A CN1103383C CN 1103383 C CN1103383 C CN 1103383C CN 98111066 A CN98111066 A CN 98111066A CN 98111066 A CN98111066 A CN 98111066A CN 1103383 C CN1103383 C CN 1103383C
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Abstract
The present invention relates to a component for spinning parallel bicomponent composite porous hollow fibers, which belongs to the preparation of fibers. A plurality of bicomponent polymers ((PE/PP, PET/PBT and high-viscosity PET/ low-viscosity PET) are melted and enter a bicomponent storage cavity through an isolation cavity, the polymers are conveyed in a balance mode through a gradual distribution plate, and bicomponent fusants enter a spinning guide hole in parallel under the separation of a composite adjustment plate. Because selected bicomponents are compatible with each other, one component is extruded from a porous spinning plate, and composite porous hollow fibers with the performance of three-dimensional crimp better than normal three-dimensional crimp are prepared through cooling and stretching. Porous hollow bicomponent fibers can be produced by slightly reforming spinning components of composite spinning machines simply. The present invention is a method with the advantages of less investment and obvious effect.
Description
One, invention field
The invention relates to a kind of compound porous type doughnut filament spinning component, more particularly, be about the compound porous type doughnut of a kind of bi-component arranged side by side filament spinning component, be applicable to PE/PP, PET/PBT, PET high viscosity/multiple polymers composite molten spinning such as PET low viscosity.
Two, background technology
Doughnut has been widely used in filler, as: wad a quilt with cotton, clothes etc., with warming, the lightweight performance of performance doughnut, yet fluffy, the resilience of filler have proposed curling requirement to this fiber again.
In JP81-29007, propose the asymmetric process for cooling process of a kind of off-centre, prepared the single doughnut of three-dimensional crimp thus.The origin cause of formation that analyzing three-dimensional curls is: the polymer of extruding from spinneret orifice since the off-centre of spray orifice to cause melt to distribute in the fibre section asymmetric, difference appears in the hollow tube wall thickness, when this melt in the ring blast-cold but in the process, the different and hollow heat insulating function of wall thickness causes the asymmetry of its cooling; Cooling effect had both made it shrink, and formed the speed difference of crystallization simultaneously again, caused the difference of the inner latent stress of condensate.This stress difference finally cause fiber vertically with laterally be distorted, form the three-dimensional crimp of fiber.Yet further analysis, this stress that is caused by temperature is faint, it can be from becoming the bloated order of magnitude 10 of fine polymeric hotline expansion coefficient
-5K
-1As seen.The cooling of spinning nozzle polymer melt is subjected to all effects limit, the difference that can not occur great disparity in the both sides of fiber, contraction of Chu Xianing and degree of crystallinity difference obviously are faint thus, more mainly be the stress difference that produces this moment can along with pushing away of time die and the external force effect under the disappearance of can comparatively fast going down, this is difficult to lasting reason with regard to the three-dimensional crimp that has determined the one-component doughnut.
JP96-226008 has proposed with High Viscosity PET and low viscosity PET at the one-component doughnut existing principle matter of curling, by special spinnerets extrude cooling, stretching makes composite bicomponent list hollow, crimped fiber arranged side by side.This technology makes it the different of shrinkage factor and crystallization to occur in cooling procedure by means of the difference of polymer molecule amount, reaches the crimp property that improves fiber.Yet single hollow has been subjected to the impact of many doughnuts, replaced by many doughnuts as heat insulating material formed single doughnut, as: seven hollows of Du Pont and the patent that the inventor applies in advance are (open: CN1177022A).Thus, how to make fiber obtain lasting good crimp property, this is to give the important topic that many doughnuts become the heat insulating material formed and military project of high-performance of new generation, extraordinary demand material such as medical.
Three, summary of the invention
One of purpose of the present invention provides the compound porous type doughnut of a kind of bi-component arranged side by side filament spinning component, thereby satisfies bi-component melt spinning technique technology, produces composite bicomponent porous type hollow stereo crimped fiber.
Two of purpose of the present invention provides a kind of composite regulating board that is applicable to the compound porous type doughnut of bi-component arranged side by side filament spinning component.
Three of purpose of the present invention provides a kind of porous spinnerets that is applicable to the compound porous type doughnut of bi-component arranged side by side filament spinning component.
These and other purpose of the present invention will further be launched and set forth by following detailed description and explanation.
Principle of the present invention is the memory effect of " bimetal leaf ".As everyone knows, the thermal deformation of bimetal leaf depends on the thermal dilation difference of unlike material.Analyze bi-component and become fine condensate (the same base polymer of different polymer or different viscosities), because the morphosis of the different molecular structures of bi-component and the same as-spun fibre both sides that viscosity differences causes and the degree of orientation is inconsistent also can cause thermal expansion difference to occur.That the hotline expansion coefficient difference of hetero-polymer has in addition up to one times about.As, the hotline expansion coefficient of PE/PP is respectively 20.2-22.0 * 10
-5K
-1/ 6.0-8.0 * 10
-5K
-1, the PET/PBT hotline expansion coefficient is respectively 7-8 * 10
-5K
-1/ 6.0-8.0 * 10
5K
-1The both sides that in a single day condensate of this species diversity great disparity can give birth to fiber side by side occur, and the difference that its thermal contraction causes is huge, and is lasting, thereby it can improve the crimp property of fiber at all.
How to utilize and reach above-mentioned performance, the ability of volume certainly that as-spun fibre is potential fully obtains embodying, and the perfect reasonably filament spinning component of design one cover (comprising the spinnerets of isolation, distribution plate, composite regulating board and the geometry that adapts) is core of the present invention place.
Difficult point of the present invention is the both sides that bi-component are presented on side by side porous hollow fiber in the demand ratio, owing to be subjected to the restriction of fibre number, the tube wall of porous hollow fiber is very thin, and this has proposed strict demand to the pore-forming separately of bi-component and the strong bonded of bi-component intersection.How to make bi-component evenly, stably be delivered to the difficult point that the spinnerets guide hole becomes solution in proportion.
The approach that the present invention solves above-mentioned difficult point is to adopt composite regulating board, and it is placed between distribution plate and the spinnerets.Melt at first plays storage, buffering, build-up pressure by composite regulating board, bi-component is stablized, passed through guide hole quantitatively, then in the exit of guide hole, bi-component is imported spinnerets guide hole (seeing accompanying drawing 1-1 to 2-1 and Fig. 1-2 to 2-2 for details) pari passu.Because the bi-component melt only converges in the spinnerets guide hole, contact with each other in blink at the utmost point afterwards, and fuse into one and push by spinneret orifice.This process should make bi-component appear at side by side among the finished fiber, and contact interface is combined closely, and relies on two kinds of component inherent characteristic differences, finally makes this fiber reach the purpose of permanent curl.Said process has proposed to need strictness to import the spinnerets guide hole pari passu to bi-component, and need have similar pressure in the spinnerets guide hole, to melt to be body, but interface significantly arranged side by side is arranged, and this need have strict guarantee to the bi-component flow pressure, and the method for salary distribution of Cai Yonging is to reach routinely.
Composite regulating board of the present invention is to be made of the plate face of equal well-balanced distribution guide holes, flows into the stability of flow of guide hole for making melt, and pressure is even, is provided with skewed slot at the guide hole inlet side.The bi-component melt at first stores in skewed slot, treats just can flow among the guide hole by the slit that skewed slot top and guide hole connect after melt is full of in the whole skewed slot.In view of the reserves of skewed slot much larger than guide hole, so skewed slot has played cushioning effect; Only there is very little slit in perforation place in view of skewed slot and guide hole again, and melt need be set up certain pressure could pass through slit, has played balanced output action so slit exists.Solved melt thus and easily caused short circuit and the uneven phenomenon of input by distribution plate arrival spinnerets guide hole.The symmetrical equilibrium of the bi-component output though above-mentioned design has been determined is desired to make to distribute side by side in the fiber still to have difficulties.Be provided with the loudspeaker enlarging in composite regulating board guide hole exit, the loudspeaker enlarging of adjacent passages meets on the bottom surface of composite regulating board formed taper and splits end for this reason, and it places about the spinnerets guide hole center of circle.The bi-component melt is being split two side flow of end, reach strictness bi-component output pari passu with this, both guaranteed the adjustability of bi-component, begun to form clear and definite interface arranged side by side splitting end again, guaranteed for the shaping of bi-component parallel composite fiber provides extremely reliably.
Porous type hollow spray filament plate structure of the present invention has proposed more harsh requirement, two aspects of concrete manifestation: the control of (1) spinnerets micropore draw ratio, the design of (2) spinneret orifice type for adapting to the introducing owing to bi-component.In view of bi-component flows in the micropore of same draw ratio after entering the spinnerets guide hole, and the inherent characteristic of bi-component exists difference, different draw ratios can cause the expanded appearance difference in melt aperture, and the too big difference of both expanded appearance will cause the fiber hole shape to disappear or breaks.Need select corresponding draw ratio at different bi-components thus, expanded with the control aperture; Split randomness that end both sides be distributed in appearance spinneret orifice shape at composite regulating board in view of bi-component again, the intersection in bicomponent fiber cross section is very narrow again, this has proposed new requirement again for the shaping of many hollows, and the spinneret orifice that designs the suitable different melt viscosity of a kind of energy forms the key of spinneret design.For adapting to the requirement of many hollow of bi-component melt closed loop, C font and E font slit have been selected, above-mentioned slit is distributed in ray one side of thinking the center with the spinneret orifice circle, constitute several multiple pass hollow spray filament plates, rely on the remarkable closed-loop characteristic of this unique pass and distribution, realized the shaping of the compound porous type doughnut of bi-component arranged side by side.
Composite regulating board of the present invention presents with circle or rectangular slab in circle or rectangle filament spinning component.Guide hole is symmetrically and evenly distributing on the plate face, the diameter of guide hole should be between 2～3.5 millimeters, radial spacing at the circular slab centre feed hole should be between 3～8 millimeters, circumferentially spacing also should be between 3～8 millimeters, horizontal spacing at the rectangular slab centre feed hole should be between 4～7 millimeters, and longitudinal pitch should be between 4～7 millimeters.
Composite regulating board guide hole of the present invention inlet (accompanying drawing 1-3) is a slit with skewed slot perforation place, and melt and can enter guide hole by slit under certain pressure after skewed slot is full of.Skewed slot plays the effect of storage, buffering, equilibrium and current stabilization at this, and at above-mentioned requirements, skewed slot is wide should be between 5～7 millimeters, deeply should be between 3～5 millimeters, the inclination angle of skewed slot should be between 25 °～45 °, and skewed slot is the groove of circular ring type in circular slab, and is straight-line groove in rectangular channel.
Composite regulating board guide hole outlet of the present invention (accompanying drawing 1-3) is provided with the loudspeaker enlarging, the bell-mouthed joining of adjacent passages (circular slab is that radially adjoining guide hole, rectangular slab are horizontal adjacent passages) is promptly in the bottom surface of composite regulating board, and above-mentioned identical joint (on the circular slab joint in identical circle footpath being built up the vertical straight line dividing plate that on the annulus, rectangular slab of taper vertical joint is built up taper) has been constituted the bi-component composite regulating board.The melt of different components owing to flowing in the adjacent passages, in this output side by side that crosses, for strictness reaches compound regulating action, spacing should be between 0.2～0.5 millimeter between the bottom surface of composite regulating board taper end points and plate by this composite regulating board.
Spinnerets of the present invention (accompanying drawing 2) is identical with composite regulating board appearance and size, is circle or rectangle.Draw ratio (L: D) distinguish to some extent, need select the spinnerets of corresponding draw ratio according to different bi-components at different bi-component spray filament plates.
(L: design D) is that should to satisfy the similar aperture of bi-component expanded to spinnerets of the present invention (accompanying drawing 2-3) micropore draw ratio, finally makes the raising of fiber pass complete sum degree of hollowness.Its draw ratio of bi-component PE/PP should be at 2: 1～4: 1, and its draw ratio of PET/PBT should be at 1.75: 1～3.5: 1, and its draw ratio of High Viscosity PET/low viscosity PET should be at 1.5: 1～3: 1.The center of guide hole places on cone-shaped ring or the straight line dividing plate, or deviation slightly, reaches bi-component thus and enters the spinnerets guide hole side by side in required ratio.
Several arcuate slots of spinnerets of the present invention (accompanying drawing 3) constitute.Its arc can be the slit of C font or E font, and it is the porous type hollow spray filament plate of the side formation of central ray that its slit is distributed in the spinneret orifice center of circle.The cavity that is made of above-mentioned slit should be preferably 3～15 at 3～17, and formed many doughnuts are identical with above-mentioned cavity number; Slit (C font) width should be at 0.04～0.12 millimeter, and (E font) width should be at 0.03～0.10 millimeter, and the nearest spacing of adjacent slots should be at 0.05～0.15 millimeter.
Above-mentioned composite regulating board, spinnerets and miscellaneous part (distribution plate etc.) have constituted the filament spinning component (accompanying drawing 4) of the compound porous type doughnut of bi-component arranged side by side.This assembly is placed on the composite spinning machine, can prepare the compound porous type hollow of bi-component arranged side by side stereo crimped fiber (accompanying drawing 5-1) (seeing the patent application that the Ni of China Textile University builds people's submissions such as China--the preparation of-compound porous type hollow of bi-component stereo crimped fiber arranged side by side for details).
Because the introducing of bi-component makes the crimp property of fiber be able to basic improvement, as long as the filament spinning component of existing composite spinning equipment is slightly transformed, can produce at the enterprising professional etiquette mould of composite spinning machine, prepare above-mentioned fiber.Method makes the good fiber product of lasting crimp property thus, has fundamentally improved the existing defective of three-dimensional crimp in the past, is a small investment, and instant effect enlarges the production process that scale is implemented rapidly.
Four, description of drawings
Fig. 1-the 1st, circular composite regulating board schematic diagram.
Fig. 1-2 is a rectangle composite regulating board schematic diagram.
Fig. 1-the 1st, the composite regulating board cutaway view.
Fig. 2-the 1st, circular composite spinneret schematic diagram.
Fig. 2-the 2nd, rectangle composite spinneret schematic diagram.
Fig. 2-the 3rd, the composite spinneret cutaway view.
Fig. 3-the 1st, C font spinneret orifice schematic diagram.
Fig. 3-the 2nd, another kind of C font spinneret orifice schematic diagram.
Fig. 3-the 3rd, E font spinneret orifice schematic diagram.
Fig. 4-the 1st, circular filament spinning component schematic diagram.
Wherein, symbol 1 is represented cap, symbol 2 is represented outer collar, and symbol 3 is represented division board, and symbol 4 is represented filter, matching board is presorted in symbol 5 representatives, symbol 6 is represented first distribution plate, per two distribution plates of symbol 7 representatives, and symbol 8 is represented composite regulating board, symbol 9 is represented spinnerets, symbol 10 is represented spinneret orifice, and on behalf of the A composition, symbol 11 accumulate the place, and on behalf of the B composition, symbol 12 accumulate the place, symbol 13 representatives are presorted matching board A composition and are accumulated the place, symbol 14 representatives are presorted matching board B composition and are accumulated the place, and symbol 15 is represented the first distribution plate A composition cannelure, and symbol 16 is represented the first distribution plate B composition cannelure, symbol 17 is represented the aluminium packing ring, symbol 18,19 represent conduit.
Fig. 4-the 2nd, rectangle filament spinning component schematic diagram.
Wherein, symbol 1 is represented cap, and symbol 6 is represented first distribution plate, per two distribution plates of symbol 7 representatives, symbol 8 is represented composite regulating board, symbol 9 is represented spinnerets, and symbol 10 is represented spinneret orifice, and on behalf of the A composition, symbol 11 accumulate the place, on behalf of the B composition, symbol 12 accumulate the place, symbol 20 is represented A component isolating cavity, and symbol 21 is represented B component isolating cavity, and symbol 22 is represented the spinnerets guide hole.
Fig. 5-the 1st, the three-dimensional figure that curls of many doughnuts.
Fig. 5-2 is five doughnut sectional views.
Fig. 5-3 is nine doughnut sectional views.
Fig. 5-4 is 13 doughnut sectional views.
Below further specify the present invention by specific embodiment, but embodiment only be used for the explanation, can not limit the scope of the invention.
Five, the specific embodiment
Embodiment 1: circular composite spining module
Circular composite spining module is by shown in Fig. 4-1: cap, outer collar, division board, filter, pre-separation plate, first separating plate, per two separating plates, composite regulating board, spinnerets, spinneret orifice etc. are formed.
Bi-component A, the B melt is through conduit 18,19 are delivered to the A composition respectively with it accumulates the place, symbol 12 represent the B composition place of accumulating then by separately presort matching board A composition accumulate the place and presort matching board B composition accumulate the place 13,14 distribute again, the final first distribution plate A composition cannelure and the first distribution plate B composition cannelure 15 of arriving, 16, in adjacent ring frame, stockpile different parts melt, above-mentioned bi-component melt enters each guide hole of spinnerets side by side under the accurate distribution of composite regulating board, extrude by spinneret orifice, the cooling closed loop, stretch arranged side by side composite bicomponent porous type hollow stereo crimped fiber (seeing " preparation of the compound porous type hollow of bi-component stereo crimped fiber side by side " patent application that people such as Ni Jianhua submits to for details).
Embodiment 2: the rectangle composite spining module
The rectangle composite spining module is by shown in Fig. 4-2: cap, packing ring, A component isolating cavity, B component isolating cavity, spinnerets, spinneret orifice etc. are formed.
Bi-component A, B melt enter A component isolating cavity through conduit 18,19, accumulate in the isolating cavity of B component isolating cavity 20,21, arrive the top of composite regulating board by first distribution plate and per two distribution plates 6,7, the bi-component melt enters each guide hole of spinnerets side by side under the accurate distribution of composite regulating board, process is described with embodiment 1 afterwards.
Embodiment 3: best complex is adjusted the design of plate
Circular composite regulating board (Fig. 1-1 and 1-3):
By the garden directly is that the garden plate of 180 millimeters of Φ is formed in the garden plate and is provided with round guide hole, and the radial spacing of guide hole is 6 millimeters, and circumferentially spacing is 6 millimeters, guide hole diameter D=3 millimeter; The garden annular skewed slot width e of guide hole inlet=5 millimeters, degree of depth h=4 millimeter, the inclination angle is α=30 °; Guide hole and skewed slot perforation place slit gap are δ
1=0.4 millimeter; Loudspeaker angle of inclination beta=60 of guide hole outlet °, form thus between the end points of taper and composite regulating board bottom surface apart from δ
2=0.10 millimeter.
Rectangle composite regulating board (Fig. 1-2 and 1-3):
By length is 500 millimeters, and wide is that 140 millimeters rectangular slab constitutes.Be on the rectangular slab in length and breadth to the symmetrical distribution guide hole, the horizontal spacing of guide hole is 6 millimeters, longitudinal pitch is 6 millimeters, it makes remainder guide hole inlet, outlet is identical with circular composite regulating board with skewed slot.
Embodiment 4:PET/PBT porous spinnerets (Fig. 3-2):
The D=4.5 millimeter of spinnerets guide hole, the draw ratio L of spinnerets: D Δ=2: 1.(the D Δ is that equivalent is kept straight on, and promptly is converted to the corresponding diameter of area with spinneret orifice slit accumulation area and claims equivalent diameter); The composite spinning spinneret orifice is to be distributed in symmetrically on the spinneret orifice by C font slit center, and nine holes of spinneret orifice R=1.5 millimeter are example, slit ε=0.08 of C font slit millimeter, α=110 °, β=45 °, 1=0.70 millimeter; Gap delta between two slits
1=0.12 millimeter, δ
2=0.12 millimeter; The r=0.40 millimeter.
Claims (9)
1, the compound porous type doughnut of a kind of bi-component arranged side by side filament spinning component, it mainly comprises cap, outer collar, filter, first distribution plate, per two distribution plates, division board and spinnerets, it is characterized in that also comprising a composite regulating board, this composite regulating board is between distribution plate and spinnerets.
2, the compound porous type doughnut of bi-component arranged side by side as claimed in claim 1 filament spinning component, it is characterized in that composite regulating board is circular, constitute by the guide hole that is distributed in symmetrically and evenly on the different circles footpath, the inlet of guide hole places a side of skewed slot, there is horn mouth in the guide hole exit, adjacent circle footpath guide hole horn mouth meets at the plectane bottom surface, and identical circle footpath joint is built into a cone-shaped ring.
3, the compound porous type doughnut of bi-component arranged side by side as claimed in claim 1 filament spinning component, it is characterized in that composite regulating board is a rectangle, the rectangle division board is made of the guide hole that equidistantly distributes in length and breadth, the guide hole porch places a side of skewed slot, there is horn mouth in the guide hole exit, laterally mouth is split from vertical formation taper in the adjacent passages horn mouth rectangular slab bottom surface that crosses.
4, as claim 2 or the compound porous type doughnut of 3 described bi-components arranged side by side filament spinning component, it is characterized in that the guide hole diameter is 2～3.5 millimeters, radial spacing is 3～8 millimeters between guide hole, circumferentially spacing is 3～8 millimeters, the guide hole skewed slot wide that enters the mouth is 5～7 millimeters, is 3～5 millimeters deeply, the inclination angle of skewed slot is 25 °～45 °, guide hole plane of inlet and top distribution plate spacing are 0.3～0.6 millimeter, guide hole outlet loudspeaker inclination angle is 40 °～60 °, taper split mouthful and spinning plate surface between distance be 0.2～0.5 millimeter.
5, the compound porous type doughnut of bi-component arranged side by side as claimed in claim 1 filament spinning component, it is characterized in that spinnerets is the porous spinnerets, be the plectane that is made of the many hollow spinneret orifice that is distributed in symmetrically and evenly on the concentric circles diameter, the circle footpath is identical with the circle footpath of composite regulating board bottom surface cone-shaped ring.
6, the compound porous type doughnut of bi-component arranged side by side as claimed in claim 1 filament spinning component, it is characterized in that spinnerets is the porous spinnerets, be the rectangular slab that is made of the many hollow spinneret orifice that equidistantly distributes in length and breadth, it is identical that mouthful horizontal spacing is split in horizontal spacing and the taper of composite regulating board bottom surface.
7, as claim 5 or the compound porous type doughnut of 6 described bi-components arranged side by side filament spinning component, it is characterized in that the porous spinnerets is the arcuate slots of C font or E font, the cavity number that above-mentioned slit constitutes is 3～17.
8, as claim 5 or the compound porous type doughnut of 6 described bi-components arranged side by side filament spinning component, it is characterized in that the porous spinnerets is the arcuate slots of C font or E font, the cavity number that above-mentioned slit constitutes is 3～15.
9, as claim 5 or the compound porous type doughnut of 6 described bi-components arranged side by side filament spinning component, it is characterized in that C font slit width is 0.04～0.12 millimeter, E font slit width is 0.03～0.1 millimeter, the minimum distance of adjacent slots is 0.05～0.15 millimeter, and it is ray one side that the center was constituted that above-mentioned slit is distributed in the spinneret orifice center of circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111066A CN1103383C (en) | 1998-09-07 | 1998-09-07 | Parallel spinning assembly for composite two-component porous hollow fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98111066A CN1103383C (en) | 1998-09-07 | 1998-09-07 | Parallel spinning assembly for composite two-component porous hollow fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1239743A CN1239743A (en) | 1999-12-29 |
| CN1103383C true CN1103383C (en) | 2003-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98111066A Expired - Fee Related CN1103383C (en) | 1998-09-07 | 1998-09-07 | Parallel spinning assembly for composite two-component porous hollow fiber |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103924310B (en) * | 2013-12-04 | 2018-01-02 | 太仓荣文合成纤维有限公司 | A kind of 3 D stereo elasticity rotation color fibre and its spinneret |
| CN103820871A (en) * | 2014-03-11 | 2014-05-28 | 太仓明静纺织有限公司 | Hollow-fiber manufacturing template |
| CN111411407B (en) * | 2020-05-09 | 2021-12-14 | 浙江佳人新材料有限公司 | Production process of regenerated super-dull elastic composite yarn |
| CN114427118B (en) * | 2020-10-12 | 2023-12-22 | 中国石油化工股份有限公司 | Spinning component for large-tow carbon fiber precursor and method for preparing polyacrylonitrile-based large-tow carbon fiber precursor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056317A (en) * | 1990-04-29 | 1991-11-20 | 宋建昌 | Composite spinnerette pack |
| CN1117533A (en) * | 1993-10-04 | 1996-02-28 | 智索股份有限公司 | A melt-blow spinneret device |
| US5540993A (en) * | 1993-02-16 | 1996-07-30 | E. I. Du Pont De Nemours And Company | Relating to fiber identification |
-
1998
- 1998-09-07 CN CN98111066A patent/CN1103383C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1056317A (en) * | 1990-04-29 | 1991-11-20 | 宋建昌 | Composite spinnerette pack |
| US5540993A (en) * | 1993-02-16 | 1996-07-30 | E. I. Du Pont De Nemours And Company | Relating to fiber identification |
| CN1117533A (en) * | 1993-10-04 | 1996-02-28 | 智索股份有限公司 | A melt-blow spinneret device |
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| CN1239743A (en) | 1999-12-29 |
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