CN1440470A - Sea-island typed composite fiber for warp knit treated raising and processof preparing for the same - Google Patents
Sea-island typed composite fiber for warp knit treated raising and processof preparing for the same Download PDFInfo
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- CN1440470A CN1440470A CN 01812046 CN01812046A CN1440470A CN 1440470 A CN1440470 A CN 1440470A CN 01812046 CN01812046 CN 01812046 CN 01812046 A CN01812046 A CN 01812046A CN 1440470 A CN1440470 A CN 1440470A
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- 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
- D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
- D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
- D01F8/14—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one polyester as constituent
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Abstract
The present invention relates to a sea-island type composite fiber. The sea-island type composite fiber used in warp knitting which is prepared by the direct spin draw method and by using alkali soluble copolymer polyester as a sea component and polyester mainly consisting of polyethylene terephthalate of more than 90 mole% as an island component, wherein the sea-island type composite fiber is characterized in that it satisfies the following physical properties at the same time: an initial shrinkage starting temperature the composite fiber: 55 to 90 DEG C; a maximum thermal stress temperature the composite fiber: 130 to 160 DEG C; and a maximum thermal stress per denier the composite fiber: 0.150 SIMILAR 0.250 g. The sea-island type composite fiber prepared by the present invention has good thermal shrinkage properties and excellent raising property and improves the appearance and touch of warp knit fabric.
Description
Technical field
The present invention relates to be used for islands-in-sea bicomponent fibre through compiling and preparation method thereof.More particularly, the present invention relates to be used for islands-in-sea bicomponent fibre through compiling and preparation method thereof, the yarn of island component has fabulous physical property behind the sea component owing to dissolved, so it can improve the quality as the lined tricot of final products.
Background technology
Using islands-in-sea bicomponent fibre to prepare in the warp knitting technology of tricot, because braiding speed is very fast, so the quality of yarn, the particularly smoothness to yarn are had very high requirement.
In addition, the postprocessing working procedures of preparation tricot needs the step of large amount of complex, and as decrement, napping, dyeing etc., this need control the internal stress and the thermal contraction performance of yarn aptly.
Specifically, extremely important in the preparation tricot by the thermal shrinkage stress of the internal structure decision of each sea component of islands-in-sea bicomponent fibre and island component.
Use alkali-soluble polymer as sea component and fibre-forming polymer as the island component, and they are spun into fabric of island-in-sea type by conjugate spinning, with the preparation islands-in-sea bicomponent fibre, this method is mainly used to prepare fine denier fiber.
Perhaps, after making islands-in-sea bicomponent fibre, handle islands-in-sea bicomponent fibre with the alkali-soluble polymer of dissolving, prepare the fine denier fiber of only forming by the island component as sea component with aqueous slkali.
The method for preparing fine denier fiber with islands-in-sea bicomponent fibre, its advantage is: the method for preparing fine denier fiber with direct fabrics is compared, it can obtain spinning and the fabulous fine denier fiber of stretch process, but it woven or knitting after arrangement processing in the operation that needs organic solvent dissolution or remove the sea component polymer.
Usually, being used for through compiling the sea component polymer of woven islands-in-sea bicomponent fibre, mainly is the alkali solubility copolyesters.This is because available bases solution dissolves sea component with the decrement facility of the decrement processing that is widely used in the conventional polyester fiber, and needn't use special device and the higher organic solvent of cost recovery.
If the island component polymer is a nylon, then when the dissolving sea component, its dissolution velocity is not so important, because nylon is lower by the degree that aqueous slkali soaks into.Yet if the island component is a polyester, when the dissolution velocity of sea component was low, the island component was soaked into before sea component dissolves fully, and the physical property that causes because polyester is not alkaline-resisting dissolving the back yarn sharply descends.As a result, nappiness variation, the final products that are difficult to obtain having desirable appearance and feel.
On the other hand,, can avoid the generation of the problems referred to above, and can reduce alkali concn, solution temperature and reduce dissolution time, can reduce the dissolving cost thus, improve productive rate if the dissolution velocity of sea component is very fast.
In order to improve the dissolution velocity of sea component, should increase the amount of copolymerization.But, if the amount of copolymerization too increases, then become the amorphous polymer that does not have fusing point to have only softening point at the deliquescent while sea component of increase, make spinning become difficult like this.
The prior art of alkali soluble polyester that preparation is used for islands-in-sea bicomponent fibre comprises following method: 1) in the method for polyester process combined polymerization dimethyl-5-sulfo group isophathalic acid sodium salt (hereinafter referred to as " DMIS ") or low-molecular-weight poly alkylene glycol (hereinafter referred to as " PAG "); 2) method of mixed polyester and high molecular PAG; And 3) method of mixed polyester polymer and high molecular PAG.
Above-mentioned prior art is a sea component with the alkali soluble polyester, is the island component with the conventional polyester, and by spinning, when Drawing and false twisting prepares islands-in-sea bicomponent fibre, the flatness of yarn (smoothness) descends and the knitting property variation.
More particularly, because the yarn of false twisting is bulk, so in the decline of the knitting property in compiling at a high speed.In addition, because the thermal contraction performance of yarn is relatively poor, nappiness descends, and in the outward appearance and the degradation of lined tricot in the napping process of editorial afterword.
Summary of the invention
An object of the present invention is to provide a kind of islands-in-sea bicomponent fibre, because its smoothness (hereinafter referred to as " flatness ") and the heat-shrinkable of yarn are fabulous, so particularly suitable is made the yarn of use in compiling.Because reducing the flatness of yarn, the friction between yarn and the knitting needle can improve processability.
Another object of the present invention provide have suitable degree begin to shrink the time the islands-in-sea bicomponent fibre of initial temperature, maximum thermal stress temperature and per dawn maximum thermal stress, to improve the forming property of sea component and island component in nappiness and dissolving and the napping process.
Another object of the present invention provides and is particularly useful as through compiling the islands-in-sea bicomponent fibre of yarn.
In order to achieve the above object, according to the present invention, with the alkali solubility copolyesters is sea component, with the main polyester that is made of the Polyethyleneglycol Terephthalate that surpasses 90mole% is the island component, method by direct spinning stretching prepares the islands-in-sea bicomponent fibre that is used for through compiling, it is a feature to satisfy following physical property simultaneously: the initial temperature that-composite fibre begins to shrink: 55-90 ℃, the maximum thermal stress temperature of-composite fibre: 130-160 ℃, per dawn maximum thermal stress of-composite fibre: 0.150-0.250g.
In addition, the invention provides the method that a kind of preparation is particularly useful as the islands-in-sea bicomponent fibre through compiling yarn, it by direct spinning stretching method and with the alkali solubility copolyesters as sea component, make as the island component with the polyester that mainly is made of the Polyethyleneglycol Terephthalate that surpasses 90mole%, this method is a feature to satisfy following physical property simultaneously :-the first godet roller speed (V
1): 1,000m/min-5,000m/min ,-the second godet roller speed (V
2): 1,500m/min-6, the 000m/min ,-degree of crystallinity of composite fibre: 8.5-25% on first the godet roller ,-birefringence of island component (Δ n): 0.10-0.20 in the composite fibre on second godet roller.
Below, better embodiment of the present invention is described with reference to the accompanying drawings.
At first, in the present invention, use the alkali solubility copolyesters as sea component and the polyester that mainly constitutes by the Polyethyleneglycol Terephthalate that surpasses 90mole% as the island component, and use the conjugate spinning spinning head, carry out conjugate spinning.
In the present invention, can improve nappiness and island forming property by the melt viscosity of regulating sea component and island component aptly.
Usually, in spinning process, pressure is applied to and makes fiber produce shear flow on the spinning head by extruder.Flow velocity in the extruder and shear rate are very low, and be then very high in spinning head.Be called melt viscosity (MV) with the corresponding shear stress of this shear rate, it is different with the difference of polymer property.
But during the two or more polymer manufacture islands-in-sea bicomponent fibre of conjugate spinning, because the melt viscosity of sea component has nothing in common with each other, so their shear stress difference, the result has influenced the island formability of composite fibre and the physical property of composite fibre.
Therefore, cross section, required uniform island is shaped and the physical property of instructions for use in order to obtain, and needs to select to have the island component polymer of suitable melt viscosity.
Specifically, to the lined tricot product, for nappiness and outward appearance and the feel that shows spun yarn, the polymer that is used for islands-in-sea bicomponent fibre will keep relative viscosity of their appropriateness rather than their melt viscosity.
In the present invention, the difference between the melt viscosity of the melt viscosity of island component polymer and sea component polymer during shear rate 9,000 (1/s) is (hereinafter referred to as " Δ MV
9,000") difference between the melt viscosity of the melt viscosity of island component and sea component when being shear rate 500 (1/s) (hereinafter referred to as: " Δ MV
500") 20-70%.That is, should be less than the Δ MV value at extruder place in the value of the Δ MV at spinning head place.
In other words, should reduce to cause the difference (Δ MV) of the melt viscosity between island component polymer and the sea component polymer with the increase of shear rate.Otherwise the orientation of island component descends, and make knitting property descend owing to be difficult to fully stretch, and face fibre can twine mutually in tricot.
Fig. 4 is the increase with shear rate, the graph of a relation that Δ MV changes.In Fig. 4, can find increase along with shear rate, the difference of melt viscosity progressively reduces between island component and the sea component.
In addition, preferably shear rate 500-9, the melt viscosity of sea component (hereinafter referred to as " MVs ") is lower than melt viscosity (hereinafter referred to as " MVi ") (MVs≤MVi) of island component during 000 (1/s).Fig. 3 is the melt viscosity of each component and the graph of a relation between the shear rate.
If the melt viscosity of sea component (MVs) is greater than the melt viscosity (MVi) of island component polymer, then the cross section of islands-in-sea bicomponent fibre may be difficult to be shaped.The even formability that this has caused the decline of island component quantity or has destroyed the island component, and make nappiness variation in the napping process, the outward appearance and the feel that are difficult to show final products.
And preferably the difference of melt viscosity (hereinafter referred to as " Δ MV ") is moored less than 1,000 between sea component and the island component.If the difference of melt viscosity (Δ MV) is greater than 1,000 pool between sea component and the island component, then the island component can be bonding mutually in spinning process, even form the also unseparated fiber that do not separate of dissolving back island component.The result can cause that the napping state of fiber in the tricot is inhomogeneous, outward appearance is unintelligible, optics (writing) deleterious and feel are coarse.
Available characteristic viscosity is regulated the melt viscosity of island component polymer, and by the kind of controlling copolymer aptly, the amount of copolymer and the melt viscosity that the combined polymerization condition is adjusted the sea component polymer.
As the example of the melt viscosity of adjusting the sea component polymer, can be with 3-15 mole DIMS and polyethylene terephthalate copolymerization, and to wherein adding the 4-20 weight % polyethylene glycol of mean molecule quantity above 8,000.
Then, in the present invention, the islands-in-sea bicomponent fibre tow that stretches and spin between first godet roller 2 and second godet roller 3 is wound on the up-coiler 4 subsequently.In other words, in the present invention, prepare islands-in-sea bicomponent fibre by the direct spinning stretching method of carrying out spinning and stretching simultaneously.
Compare with the method for preparing bulk islands-in-sea bicomponent fibre by the spin-drawing false twisting, the present invention can prepare the yarn with flatness, so be more suitable at a high speed through compiling.
At this moment, the first godet roller speed (V
1) be 1,000-5,000m/min, preferably is 1,000-3,000m/min, and the second godet roller speed (V
2) be 1,500-6,000m/min.If first godet roller, 1 speed and second godet roller, 2 speed are lower than above-mentioned scope, then yarn can not be orientated and crystallization fully, causes when napping after this clipping inhomogeneous, the decrement in the also uncontrollable decrement process.
In addition, if the first godet roller speed and the second godet roller speed surpass above-mentioned scope, then the birefringence of island component and degree of crystallinity descend in the yarn, can not satisfy the physical property of yarn thus, and therefore reduce the processability through compiling.
Except controlling the first godet roller speed and the second godet roller speed, can wait by draft temperature, stretching ratio, cooling condition, the melt viscosity that changes the fabric of island-in-sea type polymer aptly in the physical property of each stage yarn of spinning process and to regulate.
At first, preparation condition is set at the degree of crystallinity that makes yarn on first godet roller, promptly the degree of crystallinity through the yarn of first godet roller is 8.5-25%.If degree of crystallinity is higher than above-mentioned scope, then be difficult to implement to stretch in draw stage, processing can not be gone on.If degree of crystallinity is lower too much than above-mentioned scope, then, need excessive stretching for obtaining the yarn of desirable physical properties.This causes excessive tensile stress, has increased the deviation of physical property thus and has caused processing difficulties.
In addition, preparation condition is set at makes on second godet roller that the birefringence of island component (Δ n) is 0.10-0.20 in the composite fibre.If birefringence departs from above-mentioned scope, the yarn of then reeling comprises too high mechanical performance, is unwell to clothes, causes the overpowering fatigue phenomenon of polymer thus, and this phenomenon accumulates in the physical property of yarn is sharply descended.
In order to obtain islands-in-sea bicomponent fibre preferably, be more preferably the performance at each of spinning process control yarn as described below in stage.But method of the present invention is not limited to following condition.
In addition, the modulus that is more preferably yarn on first godet roller is 5-35g/d.If the modulus of yarn departs from above-mentioned scope on first godet roller, the stress that then is applied on the yarn is too much, makes the tow fracture or produces fracture, reduces the spinnability of spinning thus.
In addition, preparation condition is set at makes on first godet roller birefringence of island component (Δ n) in the composite fibre, promptly the birefringence (Δ n) by island component in the yarn of first godet roller is 0.005-0.090.If birefringence is greater than above-mentioned scope, then mechanical stress is too big, can produce phenomenon of rupture like this.If less than above-mentioned scope, then the modulus of yarn, intensity and elongation are too low, so that can't spinning.
In addition, preparation condition is set at the modulus 60-90g/d that makes the yarn on first godet roller.If modulus is lower than above-mentioned scope, then reduction of the density of yarn and elongation become too big, and mechanical strength becomes ambassador's napping fine hair and becomes coarse, has weakened the effect of fabric of island-in-sea type spun yarn thus.
In addition, preparation condition being set at the degree of crystallinity that makes yarn on second godet roller is 25-45%.If degree of crystallinity is lower than above-mentioned scope, because tension force is lower, the trafficability characteristic variation of yarn makes difficulty in spinning and the physical property of yarn is descended thus.If be higher than above-mentioned scope, then tow becomes firm, oriented crystalline is too high, is not suitable for being used as through compiling yarn.
Use the aftermentioned method to measure the various physical properties of yarn on first godet roller.The sampling method of yarn is as described below on first godet roller.At first cut the tow at the first godet roller front end place, almost cut the tow of the first godet roller rear end simultaneously with catcher, be wound on the surface of first godet roller once the cutting yarn of just will taking a sample with catcher.
More particularly, taking a sample once cutting back is wound on the tow that is positioned at a laminar surface on first godet roller, in case the variation of the physical property that causes owing to the temperature of first godet roller.
Use the aftermentioned method to measure the various physical properties of yarn on second godet roller.The sampling method of yarn is as described below on second godet roller.At first, almost cut the tow of the second godet roller front and rear simultaneously, take a sample to being wound on the lip-deep tow of second godet roller then with catcher.
The gained according to the present invention, the islands-in-sea bicomponent fibre (Fig. 1 4) that is used for through compiling has following feature.
At first, the composite fibre initial temperature that begins to shrink is 55-90 ℃.Between first godet roller and second godet roller, yarn is stretched, and it is shifted to the high crystalline state of high orientation from the low crystalline state of low orientation, finally reduced the initial temperature that begins to shrink.
Therefore, if the initial temperature that begins to shrink is lower than 55 ℃, show that then crystal orientation is excessive.If the initial temperature that begins to shrink is higher than 90 ℃, then show the orientation deficiency of crystal, this composite fibre is not suitable as through the volume yarn.
In addition, the maximum thermal stress temperature of composite fibre is 130-160 ℃.Thermal contraction energy the best when the maximum thermal stress temperature of silk.And the last handling process of most warp-knitting product carries out in above-mentioned scope.
Thereby, if the maximum thermal stress temperature is lower than above-mentioned scope, then can produce excessive contraction, and be difficult to control last handling process in the starting stage of post processing.If the maximum thermal stress temperature is higher than above-mentioned scope, undershrinking in the post processing has then reduced the volume and the density of tricot like this, and the result makes the outward appearance and the feel variation of final products.
In addition, the maximum thermal stress of per dawn composite fibre is 0.150-0.250g.The heat treatment degree that puts on yarn in thermal stress and the process is relevant.If per dawn maximum thermal stress is lower than above-mentioned scope, can cause the crystal orientation deficiency, make elongation become big.If per dawn maximum thermal stress is higher than above-mentioned scope, can cause too high crystal orientation, make yarn become coarse.That is, if per dawn maximum thermal stress not in above-mentioned scope, then the back processing characteristics descends the outward appearance of knitwear itself and feel variation.
As mentioned above, the thermal contraction performance of islands-in-sea bicomponent fibre of the present invention is coordinated mutually.Make that formability, nappiness and the feel in silk cross section are fabulous, and the physical property of composite fibre descends minimumly in dissolving sea component and napping process.Therefore, islands-in-sea bicomponent fibre of the present invention is particularly suitable for the yarn as preparation napping warp-knitting product.
Before the dissolving sea component, the filament fiber number of composite fibre of the present invention is the 2-5 dawn, and the filament fiber number is the 0.001-0.3 dawn after the dissolving sea component.The modulus of composite fibre is 25-60g/d after the dissolving sea component.Preferably the total fiber number of composite fibre is 50-150 before the dissolving sea component, but is not limited thereto.
With islands-in-sea bicomponent fibre braiding tricot of the present invention, then with aqueous slkali dissolving sea component and through the napping operation, the preparation lined tricot.Under 95 ℃, handled islands-in-sea bicomponent fibre 30 minutes in the sodium hydroxide solution (bath raio=10: 1) of 1% concentration, with the dissolving sea component.
The strength retention of islands-in-sea bicomponent fibre of the present invention after the sea component dissolving surpasses 82%.
About islands-in-sea bicomponent fibre of the present invention, since the solubility of sea component and the physical property of yarn, the reduction minimum of the modulus of yarn in above-mentioned sea component course of dissolution or napping process.As a result, nappiness improves, and is fabulous as the outward appearance and the feel of the tricot of final products.
In the present invention, the physical property of composite fibre is estimated as follows.
The initial temperature that yarn begins to shrink, maximum thermal stress temperature and per dawn maximum thermal stress
Thermal stress tester with KANEBO company is measured.Particularly, ring-shaped sample (composite fibre) that 10cm is long is locked in that the top and bottom hook is gone up and applies predetermined pressure (total dawn of sample * 2/30g) to it.In this state, with (150 ℃/min) heat up of predetermined speed.At this moment, be shown in Fig. 2, obtain each physical property then with the corresponding stress power variation of variations in temperature.The x place temperature of Fig. 2 is the initial temperature that composite fibre begins to shrink, and is equivalent to the glass transition temperature (Tg) of composite fibre, and the y place of Fig. 2 is the maximum thermal stress temperature, and it is the temperature of composite fibre when being subjected to maximum stress.In addition, maximum thermal stress value (the z part of Fig. 2) the following formula of substitution that obtains is calculated per dawn maximum thermal stress of composite fibre.
Per dawn maximum thermal stress value=maximum thermal stress/(sample total denier * 2)
Intensity/modulus
Use tension tester measured intensity/modulus 10 (specimen length: 5cm, elongation speed: 30cm/min), obtain mean value of Instron company.Herein, modulus is an initial modulus.
Density (ρ)
Islands-in-sea bicomponent fibre is put into the densitometer that the mixed solvent by normal heptane and carbon tetrachloride constitutes (Japanese Shibayama company product, model: the SS type), and placed a day down at 23 ℃, measure the gross density of bulk state sea and island bicomponent fiber then.
Degree of crystallinity (Xc (%))
Solid density value (ρ by the density that as above records polyester (ρ), complete crystalline polyester
c=1.457g/cm
3) and the complete density value (1.336g/cm of amorphous polyester
3), obtain degree of crystallinity.
Degree of crystallinity (Xc (%))=((ρ-ρ
a)/(ρ
c-ρ
a)) * 100
. the birefringence of island component in the composite fibre (Δ n)
Use interference microscope (Karl Zeiss company product, model: JENAPOL-UINTERPHAKO) measure birefringence.Birefringence is obtained by following formula.
Birefringence (Δ n)=(R+S)/(1000 * D)
Herein, R represents that compensation lags behind, and S represents the hysteresis of quartzy compensation, and D represents fibre diameter.In addition, the unit of R and S is nm, and the unit of D is μ m.
Sea component is removed the retention of back yarn intensity
By said method, use Instron to obtain the intensity that sea component reduces front and back yarns (composite fibre), the intensity of the yarn in following formula before and after the dissolving of substitution sea component obtains the retention that sea component is removed the back yarn intensity.(handled islands-in-sea bicomponent fibre 30 minutes in the bath raio (solution: yarn)=10: 1), at 95 ℃ in 1% sodium hydroxide solution with the dissolving sea component.
The retention of the intensity of yarn after sea component reduces=
(sea component reduces the intensity of the intensity/preceding yarn of sea component minimizing of back yarn) * 100
Herein, the intensity of yarn refers to the toughness (g/d) of yarn.
Melt viscosity
(specification: L=25.38mm, D=0.762mm L/D=33.31) put on shear stress on the sample (sheet), change shear rate and measure melt viscosity to use capillary rheometer.At this moment, the melt viscosity of polymer is at 290 ℃, and shear rate continues in 500 (1/s)-9,000 (1/s) scopes to change, under vacuum state with island component polymer (section) and sea component polymer (section) 150 ℃ of dryings 5 hours.
Cross section, island forming property
500 samples of sampling composite fibre cross section preparation, and with microscopic examination with estimate the uniformity and the dispersiveness of this cross section shaping.Particularly, if it is that uniform and unsegregated island number of components is less than 2 that this cross section is shaped, then forming property is fabulous, if it is that uneven and unsegregated island number of components is less than 2 that this cross section is shaped, then forming property is that uneven and unsegregated island number of components is 3-4 for well if this cross section is shaped, and then forming property is general, if unsegregated island number of components is greater than 5, then forming property is for poor.
Description of drawings
In conjunction with the accompanying drawings, below detailed description will make above-mentioned purpose of the present invention, feature and advantage become more obvious, wherein:
Fig. 1 is the schematic diagram of process of the present invention;
Fig. 2 is the example of temperature pressure curve;
Fig. 3 constitutes the schematic diagram that concerns between the melt viscosity of each component of islands-in-sea bicomponent fibre of the present invention and the shear rate;
Fig. 4 constitutes the schematic diagram that the difference (Δ MV) of melt viscosity between the sea component of islands-in-sea bicomponent fibre of the present invention and the island component changes.
The specific embodiment
Below, will describe the present invention in detail by embodiment and comparative example, but be not limited only to them.
Embodiment 1
By 8 weight %, number-average molecular weight is that 4mole% dimethyl-5-sulfo group isophathalic acid sodium is arranged is that the copolyesters of copolymer is mixed with 700 pool MV for 8,500 polyethylene glycol and copolymerization
500With 300 pool MV
9000Alkali-soluble polymer.
The alkali-soluble polymer that makes is used as sea component, and inherent viscosity is 0.65 polyethylene terephthalate (MV
500: 1,200 pool, MV
9000: 500 pools) as the island component.Come spinning at 288 ℃ with the conjugate spinning spinning head that 36 island components are arranged.
Then, with spin silk be 1 at rotating speed, 500m/min, temperature are that 80 ℃ first godet roller and rotating speed is 4,200m/min, temperature are to stretch between 125 ℃ second godet roller.Then, with 4,150m/min speed is reeled, and prepares the islands-in-sea bicomponent fibre of 75 dawn/24 fiber thus.
At this moment, the cooling condition under the spinning nozzle is set at: relative humidity 100%, 20 ℃ of cooling air temperatures, cooling air velocity 0.4m/sec.In addition, preparation condition is set at: the birefringence of sea component is 0.137 in the composite fibre on first godet roller on degree of crystallinity 8.8%, the second godet roller of silk.
And, the modulus of yarn on first godet roller is set at 10g/d, the modulus that the degree of crystallinity that the birefringence of island component is set at yarn on 0.015, the second godet roller in the composite fibre on first godet roller is set at yarn on 30%, the second godet roller is set at 70g/d.
In 95 ℃ of 1%NaOH solution, handle islands-in-sea bicomponent fibre and dissolved in 30 minutes after the sea component that makes, use the said method evaluation to dissolve the physical property of yarn behind the sea component.Dissolved that filamentary fiber number was 0.06 dawn behind the sea component.Table 2 shows evaluation result.
Then, use islands-in-sea bicomponent fibre as the yarn on top layer prepare density as 23C/CM slightly through compiling thing, be that the copolyesters yarn and the boiling water shrinkage at 5 dawn is the yarn of 28% (high-shrinkage yarn) as backing layer with the filament fiber number then.At this moment, the content of backing layer yarn is treated through compiling 26% of thing gross weight.
Then, with napping machine handle make slightly through compiling thing, reach 50% up to shrinkage factor through compiling thing.Then, in advance will be after compiling HEAT SETTING will immerse in 98 ℃ of NaOH solution (1% concentration) 30 minutes, remove the extracted component of composite fibre through compiling thing at 90 ℃.Again with above-mentioned through compiling thing dyeing (dispersion dyeing), frosted and 1800 ℃ of HEAT SETTING, make through processing through compiling thing.Have fabulous feel and quality through what process through compiling thing.
Embodiment 2 and 3 and comparative example 1 and 2
Except the preparation condition of variation as shown in table 1, preparation 75 dawn/24 a fiber islands-in-sea bicomponent fibre under similarly to Example 1 method and condition.At this moment, winding speed is set at 99% of the second godet roller speed.
In 95 ℃ of 1%NaOH solution, handle after islands-in-sea bicomponent fibre dissolving in the 30 minutes sea component, use said method to estimate the physical property of yarn.Dissolved that filamentary fiber number was 0.06 dawn behind the sea component.Table 2 shows evaluation result.
(table 1) preparation condition
| Project | Embodiment | Comparative example | |||
| ??1 | ??2 | ??3 | ??1 | ??2 | |
| The first godet roller speed (m/min) | ??1,500 | ??2,000 | ??3,000 | ??3,000 | ??800 |
| The second godet roller speed (m/min) | ??4,200 | ??4,300 | ??5,800 | ??6.100 | ??4,000 |
| The degree of crystallinity of yarn (%) on first godet roller | ??8.8 | ??9.8 | ??10.7 | ??10.5 | ??8.0 |
| The birefringence of island component (Δ n) in the composite fibre on second godet roller | ??0.137 | ??0.141 | ??0.148 | ??0.210 | ??0.131 |
The evaluation result of (table 2) composite fibre physical property
| Project | Embodiment | Comparative example | |||
| ????1 | ????2 | ????3 | ????1 | ????2 | |
| The initial temperature that begins to shrink (℃) | ????60 | ????65 | ????68 | ????54 | ????79 |
| The maximum thermal stress temperature (℃) | ????142 | ????147 | ????152 | ????129 | ????162 |
| Per dawn maximum thermal stress (g) | ????0.163 | ????0.157 | ????0.184 | ????0.142 | ????0.253 |
| The forming property in cross section, island | Fabulous | Fabulous | Fabulous | Generally | Difference |
| Sea component reduces the retention (%) of back yarn intensity | ????89 | ????88 | ????90 | ????79 | ????78 |
Industrial applicability
Islands-in-sea bicomponent fibre of the present invention has fabulous thermal contraction performance, so the napping performance is fabulous when the preparation WARP-KNITTING, and can prepare outward appearance and the fabulous WARP-KNITTING of feel. Use this effect, islands-in-sea bicomponent fibre of the present invention is particularly useful for making lined tricot.
Claims (15)
1. one kind is used in through compiling woven islands-in-sea bicomponent fibre, it is a sea component with the alkali solubility copolyesters, with the main polyester that is made of the Polyethyleneglycol Terephthalate that surpasses 90 moles of % is the island component, make by direct spinning stretching, it is characterized in that: described islands-in-sea bicomponent fibre satisfies following physical property simultaneously: the initial temperature that-composite fibre begins to shrink: 55-90 ℃, the maximum thermal stress temperature of-composite fibre: 130-160 ℃, per dawn maximum thermal stress of-composite fibre: 0.150-0.250g.
2. islands-in-sea bicomponent fibre according to claim 1 is characterized in that: filamentary fiber number is the 2-5 dawn before the dissolving sea component, has dissolved that filamentary fiber number is the 0.001-0.3 dawn after the sea component.
3. islands-in-sea bicomponent fibre according to claim 1 is characterized in that: dissolved that the modulus of composite fibre is 25-60g/d after the sea component.
4. islands-in-sea bicomponent fibre according to claim 1 is characterized in that: the retention that has dissolved the yarn intensity of composite fibre after the sea component is greater than 82%.
5. islands-in-sea bicomponent fibre according to claim 1 is characterized in that: dissolved that the total fiber number of islands-in-sea bicomponent fibre is the 50-150 dawn after the sea component.
6. one kind prepares the method that is used in particular for the islands-in-sea bicomponent fibre through compiling yarn, described islands-in-sea bicomponent fibre is a sea component with the alkali solubility copolyesters, with the main polyester that is made of the Polyethyleneglycol Terephthalate that surpasses 90 moles of % is the island component, make by direct spinning stretching, it is characterized in that: described method satisfies following physical property simultaneously :-the first godet roller speed (V
1): 1,000m/min-5,000m/min ,-the second godet roller speed (V
2): 1,500m/min-6, the 000m/min ,-degree of crystallinity of composite fibre: 8.5-25% on first the godet roller ,-birefringence of island component (Δ n): 0.10-0.20 in the composite fibre on second godet roller.
7. method according to claim 6 is characterized in that: difference (the Δ MV between the melt viscosity of the island component polymer during shear rate 9,000 (1/s) and the melt viscosity of sea component polymer
9,000) difference (Δ MV when being shear rate 500 (1/s) between the melt viscosity of the melt viscosity of island component and sea component
500) 20-70%.
8. method according to claim 7 is characterized in that: shear rate 500-9, the melt viscosity (MVs) of sea component is lower than the melt viscosity (MVi) of island component during 000 (1/s).
9. method according to claim 7 is characterized in that: the melt viscosity between island component and the sea component (Δ MV) difference is lower than 1,000 pool.
10. method according to claim 6 is characterized in that: the degree of crystallinity of composite fibre is 25-45% on second godet roller.
11. method according to claim 6 is characterized in that: the modulus of composite fibre is 5-35g/d on first godet roller.
12. method according to claim 6 is characterized in that: the first godet roller speed (V
1) be 1,000-3,000m/min.
13. method according to claim 6 is characterized in that: on first godet roller in the composite fibre birefringence of island component be 0.005-0.090.
14. method according to claim 6 is characterized in that: the modulus of composite fibre is 60-90g/d on second godet roller.
15. a tricot, it uses the described islands-in-sea bicomponent fibre braiding of claim 1 to form.
Applications Claiming Priority (16)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020000069141A KR20010044138A (en) | 2000-11-21 | 2000-11-21 | A sea-island typed composite fiber for warp knit treated raising |
| KR2000/69141 | 2000-11-21 | ||
| KR2000/70777 | 2000-11-27 | ||
| KR2000/70775 | 2000-11-27 | ||
| KR2000/70778 | 2000-11-27 | ||
| KR2000/70774 | 2000-11-27 | ||
| KR1020000070774A KR20010044145A (en) | 2000-11-27 | 2000-11-27 | A sea-island typed composite fiber for warp knit terated raising |
| KR1020000070777A KR20010044148A (en) | 2000-11-27 | 2000-11-27 | A sea-island typed composit fiber used in warp knitting |
| KR2000/70779 | 2000-11-27 | ||
| KR1020000070775A KR20010044146A (en) | 2000-11-27 | 2000-11-27 | A method of preparing for a sea-island typed composit fiber used in warp knitting |
| KR1020000070778A KR20010044149A (en) | 2000-11-27 | 2000-11-27 | A sea-island typed composit fiber used in warp knitting, and a process of preparing for the same |
| KR2000/70776 | 2000-11-27 | ||
| KR20000070779 | 2000-11-27 | ||
| KR1020000070776A KR20010044147A (en) | 2000-11-27 | 2000-11-27 | A sea-island typed composit fiber used in warp knitting, and a method of preparing for the same |
| KR1020010020973A KR20010068065A (en) | 2001-04-19 | 2001-04-19 | A sea-island typed composit fiber used in warp knitting |
| KR2001/20973 | 2001-04-19 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1440470A true CN1440470A (en) | 2003-09-03 |
| CN1277963C CN1277963C (en) | 2006-10-04 |
Family
ID=27573808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01812046 Expired - Fee Related CN1277963C (en) | 2000-11-21 | 2001-11-20 | Sea-island typed composite fiber for warp knit treated raising and processof preparing for the same |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP1370718A4 (en) |
| CN (1) | CN1277963C (en) |
| AU (1) | AU2002224186A1 (en) |
| BR (1) | BR0115677A (en) |
| WO (1) | WO2002042528A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959074A (en) * | 2010-04-21 | 2013-03-06 | 普瑞坦医疗产品有限公司 | Collection device and material |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101933959B1 (en) * | 2011-12-27 | 2018-12-31 | 도레이 카부시키가이샤 | Conjugated fiber, base body for artificial leather, and artificial leather |
| CN111621875B (en) * | 2020-07-07 | 2023-05-19 | 上海市合成纤维研究所有限公司 | Sea-island fiber with PET as island component, preparation method thereof and superfine fiber formed by sea-island fiber |
| CN111676544B (en) * | 2020-07-07 | 2023-05-19 | 上海市合成纤维研究所有限公司 | Sea-island fiber with PP as island component, preparation method thereof and superfine fiber formed by sea-island fiber |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57176218A (en) * | 1981-04-22 | 1982-10-29 | Toray Ind Inc | Polyester antistatic composite fiber |
| KR930010807B1 (en) * | 1991-11-02 | 1993-11-11 | 주식회사 코오롱 | High shrinkage polyester mixing yarn |
| JPH06240536A (en) * | 1993-02-15 | 1994-08-30 | Toyobo Co Ltd | Highly shrinkable conjugate fiber and method for processing thereof |
| JP2954827B2 (en) * | 1994-04-28 | 1999-09-27 | 帝人株式会社 | Production method of ultrafine fiber |
| JPH10237740A (en) * | 1997-02-24 | 1998-09-08 | Toyobo Co Ltd | Polyester splashed-patterned woven fabric |
| JPH11256449A (en) * | 1998-03-10 | 1999-09-21 | Kuraray Co Ltd | Polyester-based woven or knitted fabric and its production |
-
2001
- 2001-11-20 WO PCT/KR2001/001979 patent/WO2002042528A1/en not_active Application Discontinuation
- 2001-11-20 BR BR0115677-2A patent/BR0115677A/en not_active Application Discontinuation
- 2001-11-20 EP EP01997578A patent/EP1370718A4/en not_active Withdrawn
- 2001-11-20 CN CN 01812046 patent/CN1277963C/en not_active Expired - Fee Related
- 2001-11-20 AU AU2002224186A patent/AU2002224186A1/en not_active Abandoned
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102959074A (en) * | 2010-04-21 | 2013-03-06 | 普瑞坦医疗产品有限公司 | Collection device and material |
| CN102959073A (en) * | 2010-04-21 | 2013-03-06 | 普瑞坦医疗产品有限公司 | Collection device and material |
| CN102959074B (en) * | 2010-04-21 | 2015-06-17 | 普瑞坦医疗产品有限公司 | Collection device and material |
| CN102959073B (en) * | 2010-04-21 | 2015-08-05 | 普瑞坦医疗产品有限公司 | Gathering device and material |
Also Published As
| Publication number | Publication date |
|---|---|
| EP1370718A4 (en) | 2005-02-09 |
| WO2002042528A1 (en) | 2002-05-30 |
| AU2002224186A1 (en) | 2002-06-03 |
| BR0115677A (en) | 2003-12-09 |
| CN1277963C (en) | 2006-10-04 |
| EP1370718A1 (en) | 2003-12-17 |
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