CN1304652C - A microcellular foamed fiber, and a process of preparing for the same - Google Patents
A microcellular foamed fiber, and a process of preparing for the same Download PDFInfo
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- CN1304652C CN1304652C CNB2003801016469A CN200380101646A CN1304652C CN 1304652 C CN1304652 C CN 1304652C CN B2003801016469 A CNB2003801016469 A CN B2003801016469A CN 200380101646 A CN200380101646 A CN 200380101646A CN 1304652 C CN1304652 C CN 1304652C
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- Prior art keywords
- micropore
- polymer
- fiber
- microporous fibre
- supercritical fluid
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/08—Addition of substances to the spinning solution or to the melt for forming hollow filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/08—Melt spinning methods
- D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
- D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
- D01F6/62—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyesters
Abstract
The present invention discloses microcellular fibers, in which microcells are formed with a density of more than 10<7>cells/cm<3> with a supercritical fluid introduced into fiber forming polymers and have a rate of volume expansion of 1.2 to 50, a ratio of microcell length to microcell diameter of more than 2 and a monofilament diameter of more than 5 m. The microcellular fibers provide high and uniform cell densities and are good in the rate of volume expansion and the ratio of cell length to cell diameter, thus they are very excellent in lightweight feeling and touch. The microcellular fibers are made by a method for making microcellular fibers, wherein a supercritical fluid is introduced into an extruder upon melting and mixing fiber forming polymers in the extruder, to thus prepare a single-phase solution of molten polymer and gas, then the single-phase solution of molten polymer and gas is extruded (spun) through spinneret of spinning pack by subjecting the single-phase solution to a rapid pressure drop, to thus make microcellular extrusion materials, the microcellular extrusion materials are rapidly cooled by a cooling medium, and then they are wound at a winding speed of 10 to 6,000m/min so that a spinning draft can be 2 to 300.
Description
Technical field
The present invention relates to have in the fiber microporous fibre and the manufacture method thereof of micropore, this microporous fibre has extraordinary lightweight and touches performance.
More specifically, the present invention relates to microporous fibre and manufacture method thereof, this fiber is in the time will forming the polymer-extruded and spinning that fiber uses continuously, by supercritical fluid is introduced extruder make single phase soln of molten polymer and gas, then single phase soln is sent into filament spinning component the spinning head spinning, and allow then its rapidly cooling prepare; It provides density high and uniform micropore, and has the ratio in good cubical expansivity and Kong Changyu aperture.
Background technology
Conventional porous polymer product has used considerable time industrial usually, in order to make polymer products lightweight and to save the quantity of required polymer.The polystyrene foam product is wherein typically arranged, can use in the purposes widely.
Yet the size in the hole that this general porous polymer product has is about 100 μ m, therefore is difficult to they are processed into continuous filament.In addition, their hole density is very low, is 10
6Hole/cm
3, so their touch performance and lightweight are all relatively poor, are difficult to obtain balanced physical property.
In order to address these problems, United States Patent (USP) 5,866,053 and 6,051,174 disclose a kind of method of making the micropore extruded stock, wherein when mixing with supercritical fluid such as CO
2Introduce extruder, and melt polymer prepares single phase soln of molten polymer and gas in extruder, keep under high pressure single phase soln to extrude and make single phase soln to stand fast pressure by die orifice then and descend and form many micropores.
The advantage of the micropore extruded stock by method for preparing be its cell size of providing less than 10 μ m, than first prepolymer internal memory pore little, thereby the reduction of mechanical property can not occur, and it provides and has been approximately 10
9Hole/cm
3High hole density, the requirement that can save polymer like this.But said method is unsuitable for manufacture of microcellular fibers, because be that the molten polymer that will have many micropores is extruded in the air (room temperature) and slowly cools down.
In other words,, must allow extruded stock by the spinning head spinning particularly as the filament of continuous state fiber, by very large deformation experience with its make very thin process; The method that the above-mentioned molten polymer that has many micropores slowly cools down after extruding is unsuitable for the spinning processing that fiber manufacturing processing is filament.
In addition, when the melted material with method for preparing melts and is spun into clothes filament such as polyamide filament or polyester fine filaments, the melt strength of the filament that spins is low, gas in the micropore spills from polymer after spinning (extruding) immediately like this, therefore is difficult to process the clothes filament (fiber) with high pore density.
In order to solve the problem of the outflow of gas in the micropore, attempted the method that some chemical modifications by polymer improve the melt strength of the filament that spins.But occurred the reduction of new problem as draw ratio in drawing process in this case, this makes and is difficult to manufacture of microcellular fibers.
An object of the present invention is to provide the microporous fibre that is used for clothes, formed density greater than 10 in this fiber
7Hole/cm
3Micropore, and have outstanding lightweight sense and touch performance.
Another object of the present invention is to prevent that effectively the gas in the micropore from outflowing when making microporous fibre.A further object of the present invention is to make micropore clothes fiber effectively, and it has many micropores, possesses outstanding lightweight sense and touches performance.
Summary of the invention
The purpose of this invention is to provide a kind of microporous fibre, this microporous fibre possesses fabulous lightweight sense and touches performance, because it can be formed uniformly highdensity micropore; And this microporous fibre possesses fabulous mechanical property such as intensity, because it has the ratio in good cubical expansivity and good Kong Changyu aperture.
Another object of the present invention is that to make pore density effectively be about 10
7Hole/cm
3Microporous fibre, be by in extruder, introducing single phase soln that supercritical fluid prepares molten polymer and gas, and this single phase soln extruded manufacturing.For this purpose, the present invention extrudes single phase soln of (spinning) molten polymer and gas by the spinning head of filament spinning component, makes single phase soln stand fast pressure and descends and make micropore extruded stock (fiber).In addition, the micropore extruded stock (fiber) after the present invention will extrude is cooling rapidly, spills from extruded stock (fiber) to avoid gas.The present invention is controlled at spin-drawing in the suitable scope in addition, so that can strictly keep pore density and physical property when making microporous fibre.
To achieve these goals, the feature of microporous fibre of the present invention is that supercritical fluid is introduced the micropore that forms in the polymer of making fiber, and the density of the micropore that forms is 10
7Hole/cm
3More than, cubical expansivity is 1.2～50, the ratio of micropore length and micro-pore diameter is greater than 2, and filament diameter is more than 5 μ m.
Simultaneously, the feature that the present invention makes the method for microporous fibre is when fusing and mixing forms the polymer that fiber uses in extruder, supercritical fluid is introduced extruder, the single phase soln that has prepared molten polymer and gas like this, single phase soln of this molten polymer and gas is extruded (spinning) by the spinning head of filament spinning component then, pressure descends to allow single phase soln stand fast, thereby make the micropore extruded stock, this micropore extruded stock medium that is cooled cools off rapidly then, then with 10～6, the winding speed of 000m/min is reeled, and is 2～300 thereby can make spin-drawing.
Hereinafter explanation that will be detailed in addition to the present invention.
At first, the method for microporous fibre constructed in accordance will be described in detail.In the typical synthetic fiber spinning process that will form the polymer-extruded and spinning that fiber uses continuously, forming that polymer that fiber uses melts and when mixing in extruder, supercritical fluid is introduced extruder, prepared single phase soln of uniform molten polymer of concentration and gas like this.
The polymer that the formation fiber is used comprises (i) vistanex such as polypropylene and polyethylene, (ii) polyamide such as polyamide 6, polyamide 66 and with the 3rd component copolymerization or the polyamide that mixes, and (iii) mylar such as polyethylene terephthalate reach and the 3rd component copolymerization or the polyester that mixes.
In view of the spatial configuration of micropore as size, density, distribution etc. and in view of the viewpoint of mechanical property such as intensity, more preferably form polymer that fiber uses comprise relative viscosity greater than 3.0 polyamide 6 or intrinsic viscosity in the polyethylene terephthalate more than 0.8.
If the relative viscosity of polyamide 6 less than 3.0 or the intrinsic viscosity of polyethylene terephthalate less than 0.8 o'clock, pore density may be reduced to 10
7Hole/cm
3Below, and the size in hole may be inhomogeneous.
The polymer that the formation fiber is used can comprise branched polyamides 6 and branched polyesters resin.
Supercritical fluid comprises carbon dioxide (CO
2) or nitrogen (N
2), in view of the stability of making processing, more preferably carbon dioxide (CO
2).
With respect to forming the polymer that fiber is used, the introducing amount of supercritical fluid is preferably less than 10 weight %.The fusion amount of supercritical fluid depends on the pressure and temperature of extruder in the polymer that shape or fiber are used.Particularly, the pressure of extruder is high more, when temperature is low more, and the fusion amount of supercritical fluid just becomes high more.
Secondly, the molten polymer for preparing in the extruder and single phase soln of gas are sent into measuring pump and spinning head, extrude (spinning) by the spinning head of filament spinning component then, pressure descends to make single phase soln stand fast, makes the micropore extruded stock like this.At this moment, in order to make the clothes fiber, more preferably use the filament spinning component that has two perforation spinning heads at least.
As everyone knows, multifilament is more suitable in the clothes fiber than monofilament.
The speed that pressure descends in the spinning head of filament spinning component is closely related with the pore density in the hole that produces.As everyone knows, the speed that pressure descends is rapid more, and the density in hole is just high more.In order fully to show with lightweight and to form evenly and the little micropore of size is the function of the microporous fibre of feature, preferably single phase soln is extruded as hole density 10
7Hole/cm
3Above fibrous micropore extruded stock.If the hole density that extruded stock has is less than 10
7Hole/cm
3, the improvement of comparing its lightweight with doughnut is little, and their lack commercial value like this.
The speed that pressure descends in the assembly spinning head be preferably greater than 0.18GPa/s (26,100psi/s).
Secondly, cool off the above-mentioned micropore extruded stock (fiber) of extruding (spinning) continuously rapidly, thereby prevent the leakage of gas in the micropore with cooling medium.
Under the situation of not implementing above-mentioned quick cooling processing, the gas in the micropore moves up to finally releasing from fiber at an easy rate to the surface.This causes flat two the bad phenomenons that contract in the coalescent and hole in hole.
It is last because hole density is reduced to 10
7Hole/cm
3Below, compare with doughnut like this, little to the improvement of lightweight, they lack commercial value.
To be explained above-mentioned two bad phenomenons in more detail.For the situation that forms the polymer that fiber uses, near spinning temperature, major part all has low melt strength in them.The phenomenon of Chu Xianing is like this, unless they are cooled off rapidly after extruding immediately at short notice, otherwise the diffusion rate of gas can be owing to low melt strength uprises, and gas promptly moves to the surface of extruded stock in the low air of pressure, thereby is released by the surface.The coalescent reduction in hole that this causes pore density to merge owing to adjacent bores wherein.
Other phenomenon is because gas diffusion and outflow, and the size in hole diminishes gradually, finally contracts and flatly makes the hole be eliminated to make hole density step-down owing to the hole.
These two bad phenomenons may be the fatal shortcomings that causes inhomogeneous and physical property of hole shape and hole density variation.
As cooling medium, can select to use cold air or water according to the type of polymer of employed formation fiber.Requiring under the situation of more speed cooling, preferably making water and do not use cold air.
When using cold air, can be after extruding immediately with cold air with resulting extruded stock blast-cold.Make the situation of water, can be after extruding immediately water be sprayed on the resulting extruded stock, or extruded stock is immersed in the water.In order to increase spinning speed, preferably use cold air to make cooling medium.
Secondly, continuously with 10～6, the winding speed of 000m/min is reeled with the extruded stock (fiber) of cooling rapidly, and making spin-drawing is 2～300, so that make microporous fibre.
Spin-drawing is very important machining control factor in melt spinning method, and its expression winding speed is with respect to the ratio of initial spinning speed.If the high or initial spinning speed of winding speed is low, then spin-drawing becomes big, otherwise if the low or initial spinning speed height of winding speed, then spin-drawing diminishes.
Among the present invention spin-drawing is controlled at 2～300.If spin-drawing is greater than 300,, make poor processability like this because excessive spin-drawing can produce a lot of broken yarns.If spin-drawing less than 2, can not reach oriented crystallization fully, physical property such as intensity can variation like this.
In addition, winding speed is controlled at 10～6 among the present invention, 000m/min, more preferably 50～6,000m/min.Can be dependent on density, the size of micropore and distribute and control winding speed flexibly.If pore density is very high and pore size when big relatively, just be difficult to improve winding speed.If but winding speed lacks commercial practicality less than 10m/min.
If pore density is very low simultaneously, pore size is relatively little and they are evenly distributed, then winding speed can be brought up to up to 6,000m/min.But, if winding speed 6, more than the 000m/min, can reduce processing characteristics.
Have the micropore of even formation by the microporous fibre of the present invention of said method manufacturing, the density of micropore is 10
7Hole/cm
3More than.Therefore they have fabulous lightweight and touch performance, and do not have the physical property that micropore causes such as the problem of intensity variation.
In addition, the cubical expansivity that microporous fibre of the present invention has is 1.2～50, and the ratio of micropore length and micro-pore diameter is more than 2, and filament diameter is more than 5 μ m.
If cubical expansivity, only obtains the lightweight high unlike the doughnut of 20% degree of hollowness less than 1.2, so just do not possess practicality.If cubical expansivity is more than 50,, makes and to produce yarn because excessive volumetric expansion meeting causes the reduction of intensity and the reduction of processing characteristics.
In addition, if the ratio of micropore length and micro-pore diameter less than 2, the problem of this generation is to satisfy the minimum intensity that apparel yarns requires.
The ratio of above-mentioned length and diameter is almost identical with the realistic meaning that fiber is stretched to more than the twice greater than 2 realistic meaning.
The micropore that Here it is is produced is initially sphere or honeycombed, and the ratio of its micropore length and micro-pore diameter is almost near 1.But winding speed is high more, and the micropore distortion becomes at fiber axis to the shape that is elongated.If follow drawing process subsequently, micropore is out of shape more vertically.
The result makes structural polymer orientation and subsequent crystallisation to have improved mechanical property such as intensity.Therefore, in order to show the minimum intensity of microporous fibre, micropore length must be greater than 2 with the ratio of micro-pore diameter.If do not satisfy above-mentioned condition, microporous fibre just is difficult to be fit to final purposes as making clothes.
If filament diameter is less than 5 μ m in addition, this filament diameter is not enough with respect to the micropore that average diameter is approximately 1 μ m, thereby is difficult to stably form the structure of microporous fibre.
The microporous fibre of the inventive method manufacturing has the uniform micro of a large amount of equiblibrium mass distributions, and they have first-class lightweight and touch performance like this.As a result of, they as clothes no matter the fiber used of underwear or coat be very useful.
Every physical property is used following method evaluation respectively among the present invention.
Cubical expansivity (Φ)
Measure the volume (V of polymer
p), the weight (m of polymer
p), the proportion (P of polymer
p) and the volume (V of microporous fibre
f), then with the following formula volume calculated of measured value substitution expansion rate.
Cubical expansivity (Φ)=V
f/ V
p=V
f/ (M
p* P
p)
Pore density (hole/cm
3)
With the cross section of sem observation microporous fibre, the following formula of substitution is as a result calculated hole density (ρ c)
Pore density (ρ c)=(nl * 10 μ m/l)
3/2* 10
9* the coefficient of cubical expansion
Wherein nl is the number cells that is present in the square that a length of side is lcm, is the result with sem observation.
Micropore length is for the ratio of micro-pore diameter
Measure cross sections of microcellular fibers and perpendicular to the length on the cross-sectional direction, so that obtain their ratio.
Lightweight and touch performance
Lightweight and touch performance are checked by sense organ Review Team and are estimated.In detail, if 8 people think lightweight and to touch performance be fabulous among 10 syndics, represent with ◎; If 7 people think that lightweight and touch performance are fabulous among 10 syndics, represent with △.
Implement optimal mode of the present invention
Hereinafter the present invention will be described in more detail with reference example and comparative example, but the invention is not restricted to the following example.
Embodiment 1
Fusing of use static mixer and mixing relative viscosity are 3.4 polyamide 6 resin in the extruder of 250 ℃ of temperature, introduce the carbon dioxide (with respect to the weight of resin) of 3 weight % simultaneously in the extruder, prepare single phase soln that liquid polymer and gas have uniform concentration.Single phase soln of liquid polymer and gas is extruded by the spinning head of filament spinning component (five spinning heads are arranged) continuously, the diameter of spinning head is that 0.25mm, length are 2.5mm, extrusion capacity is 10g/min, and makes single phase soln experience fast the pressure fall off rate to make fibrous micropore and discharge material.1cm constantly is sprayed onto 25 ℃ water on the fibrous micropore extruded stock under the filament spinning component basal surface, and extruded stock is cooled off rapidly.With the winding speed coiling extruded stock of 500m/min, make that spin-drawing can be 12, prepares microporous fibre then.Table 2 has shown the evaluation result of every physical property of the microporous fibre of manufacturing.
Embodiment 2～10 and comparative example 1
Except type of polymer, spinning temperature, gaseous species and the gas introducing amount used according to table 1 change cooling medium kind, method for rapid cooling, spin-drawing, winding speed, formation fiber, use method similarly to Example 1 and under same condition, make microporous fibre.The evaluation result of every physical property of manufacturing microporous fibre is listed in table 2.
＜table 1〉working condition
| Classification | Form the type of polymer (relative viscosity) that fiber is used | Spinning temperature (℃) | Gaseous species | Gas introducing amount (weight %) | The cooling medium kind | Chilling temperature (℃) | Cooling means (wind speed) | Spin-drawing | Winding speed (m/min) |
| Embodiment 1 | Polyamide 6 (3.4) | 250 | Carbon dioxide | 3 | Water | 25 | Spray-on process | 12 | 500 |
| Embodiment 2 | Polyethylene terephthalate (1.1) * | 285 | Air | 2.5 | Water | 25 | Spray-on process | 12 | 500 |
| Embodiment 3 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Water | 25 | Spray-on process | 24 | 1000 |
| Embodiment 4 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Water | 25 | Spray-on process | 37 | 1500 |
| Embodiment 5 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Water | 25 | Immersion method | 2.5 | 100 |
| Embodiment 6 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Water | 25 | Immersion method | 5 | 200 |
| Embodiment 7 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Cold air | 14 | Air cooling method (lm/sec) | 49 | 2000 |
| Embodiment 8 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Cold air | 14 | Air cooling method (lm/sec) | 74 | 3000 |
| Embodiment 9 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Cold air | 14 | Air cooling method (lm/sec) | 123 | 5000 |
| Embodiment 10 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Water | 25 | Spray-on process | 24 | 1000 |
| Comparative example 1 | Polyamide 6 (3.5) | 250 | Carbon dioxide | 3 | Do not have | - | Room temperature is cooled off naturally | 24 | 1000 |
The polyethylene terephthalate of ※ embodiment 2 (1.1)
*Be meant that intrinsic viscosity is 1.1 polyethylene terephthalate
＜table 2〉evaluation result
| Classification | Pore density (hole/cm 3) | Cubical expansivity | The ratio of micropore length and micro-pore diameter | Stability of spinning process (entire volume is around rate) | The lightweight sense | Touch performance |
| Embodiment 1 | 3×10 9 | 3.2 | 4.3 | 93％ | ◎ | ◎ |
| Embodiment 2 | 2×10 9 | 2.8 | 3.7 | 94％ | ◎ | ◎ |
| Embodiment 3 | 2×10 9 | 2.9 | 3.5 | 96％ | ◎ | ◎ |
| Embodiment 4 | 2×10 9 | 2.7 | 3.9 | 95％ | ◎ | ◎ |
| Embodiment 5 | 5×10 9 | 3.5 | 4.1 | 82％ | ◎ | ◎ |
| Embodiment 6 | 4×10 9 | 3.3 | 4.5 | 92％ | ◎ | ◎ |
| Embodiment 7 | 8×10 8 | 3.1 | 3.7 | 96％ | ◎ | ◎ |
| Embodiment 8 | 6×10 8 | 2.8 | 3.9 | 94％ | ◎ | ◎ |
| Embodiment 9 | 5×10 8 | 3.0 | 4.2 | 95％ | ◎ | ◎ |
| Embodiment 10 | 8×10 8 | 4.9 | 5.3 | 94％ | ◎ | ◎ |
| Comparative example 1 | - | - | - | Around rolling not | - | - |
※ comparative example 1 is around rolling not, therefore can not estimate ratio, the lightweight sense of its pore density, cubical expansivity, micropore length and micro-pore diameter and touch performance.
Industrial usability
Microporous fibre of the present invention has the high density micropore of even formation, therefore has fabulous lightweight and touches performance, and can not cause because of micropore the reduction of mechanical property. In addition, microporous fibre of the present invention has the ratio of good cubical expansivity and micropore length and micro-pore diameter, therefore provides fabulous mechanical property such as intensity, and has improved the performance of yarn production.
Further, the present invention can use by supercritical fluid and introduce the standby molten polymer of extrusion mechanism and single phase soln of gas, makes continuously pore density 107Hole/cm3Above microporous fibre. In addition, the present invention can prevent the gas outflow in the extruded stock (fiber) effectively, thereby has increased the density of micropore in the fiber.
Microporous fibre of the present invention has fabulous lightweight and touches performance, and the yarn of using as clothes is useful especially.
Claims (14)
1. microporous fibre forms micropore in the polymer that it is characterized in that supercritical fluid introducing formation fiber is used, and the density of the micropore that forms is greater than 10
7Hole/cm
3, the cubical expansivity that it has is 1.2～50, the ratio of micropore length and micro-pore diameter greater than 2 and filament diameter greater than 5 μ m, wherein said supercritical fluid is a kind of among carbon dioxide or the nitrogen.
2. the microporous fibre of claim 1 wherein forms the polymer that fiber uses and comprises polyamide, mylar, branched polyesters resin or acrylic resin.
3. claim 1 or 2 microporous fibre wherein form polymer that fiber uses and are relative viscosity greater than 3.0 polyamide 6.
4. claim 1 or 2 microporous fibre wherein form polymer that fiber uses and are intrinsic viscosity greater than 0.8 polyethylene terephthalate.
5. claim 1 or 2 microporous fibre, wherein forming the polymer that fiber uses is branched polyamides 6.
6. method of making microporous fibre is characterized in that in extruder fusing and mixes when forming the polymer that fiber uses, and supercritical fluid is introduced in the extruder, thereby prepared single phase soln of molten polymer and gas; Then single phase soln of molten polymer and gas is extruded by the spinning head of filament spinning component, pressure descends to make single phase soln experience fast, makes the micropore extruded stock like this; This micropore extruded stock medium that is cooled cools off rapidly then; Then with 10～6, the winding speed of 000m/min is reeled them, makes that spin-drawing can be 2～300.
7. the method for claim 6, wherein on the filament spinning component quantity of perforation spinning head greater than 2.
8. the method for claim 6, wherein the pore density of micropore extruded stock is greater than 10
7Hole/cm
3
9. the method for claim 6, wherein winding speed is 50～6,000m/min.
10. the method for claim 6, wherein supercritical fluid is a kind of in carbon dioxide or the nitrogen.
11. the method for claim 6, wherein cooling medium is one of cold air or water.
12. the method for claim 6 wherein makes its rapid cooling with water spray to the micropore extruded stock.
13. the method for claim 6, wherein the micropore extruded stock is dipped into and makes its rapid cooling in the water.
14. the method for claim 6 wherein forms polymer that fiber uses and is a kind of in acrylic resin, polyvinyl resin, mylar or the polyamide.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020020063666A KR100839508B1 (en) | 2002-10-18 | 2002-10-18 | A microcellular foamed fiber |
| KR1020020063667 | 2002-10-18 | ||
| KR1020020063666 | 2002-10-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1705776A CN1705776A (en) | 2005-12-07 |
| CN1304652C true CN1304652C (en) | 2007-03-14 |
Family
ID=35578318
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2003801016469A Expired - Fee Related CN1304652C (en) | 2002-10-18 | 2003-10-17 | A microcellular foamed fiber, and a process of preparing for the same |
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|---|---|
| KR (1) | KR100839508B1 (en) |
| CN (1) | CN1304652C (en) |
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|---|---|---|---|---|
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| CN103009540B (en) * | 2011-09-28 | 2015-03-04 | 深圳光启高等理工研究院 | Metamaterial substrate based on controllable dielectric constant and preparation method of substrate |
| CN102443882B (en) * | 2011-10-28 | 2013-12-11 | 中原工学院 | Method for preparing microporous LiFePO4/C type fiber by applying supercritical fluid melt-spraying spinning |
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| CN102443970A (en) * | 2011-10-28 | 2012-05-09 | 中原工学院 | Method for preparing polysulfonate microporous fibre non-woven fabric |
| CN102505347A (en) * | 2011-10-28 | 2012-06-20 | 中原工学院 | Method for preparing microporous fiber nonwovens by applying supercritical fluid melt-blowing and spinning |
| CN102534836B (en) * | 2011-12-14 | 2014-01-29 | 西安交通大学 | Method for preparing nano-fibers with special structures by using electrostatic spinning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5866053A (en) * | 1993-11-04 | 1999-02-02 | Massachusetts Institute Of Technology | Method for providing continuous processing of microcellular and supermicrocellular foamed materials |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5512231A (en) * | 1995-01-26 | 1996-04-30 | Hoechst Celanese Corporation | Processing cellulose acetate formed articles using supercritical fluid |
| US5762840A (en) * | 1996-04-18 | 1998-06-09 | Kimberly-Clark Worldwide, Inc. | Process for making microporous fibers with improved properties |
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2002
- 2002-10-18 KR KR1020020063666A patent/KR100839508B1/en not_active IP Right Cessation
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5866053A (en) * | 1993-11-04 | 1999-02-02 | Massachusetts Institute Of Technology | Method for providing continuous processing of microcellular and supermicrocellular foamed materials |
| US6051174A (en) * | 1993-11-04 | 2000-04-18 | Massachusetts Institute Of Technology | Method for providing continuous processing of microcellular and supermicrocellular foamed materials |
Also Published As
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|---|---|
| KR20040034974A (en) | 2004-04-29 |
| CN1705776A (en) | 2005-12-07 |
| KR100839508B1 (en) | 2008-06-19 |
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