CN101798714B - Bi-component composite fiber and preparation method thereof - Google Patents
Bi-component composite fiber and preparation method thereof Download PDFInfo
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- CN101798714B CN101798714B CN200910260590A CN200910260590A CN101798714B CN 101798714 B CN101798714 B CN 101798714B CN 200910260590 A CN200910260590 A CN 200910260590A CN 200910260590 A CN200910260590 A CN 200910260590A CN 101798714 B CN101798714 B CN 101798714B
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Abstract
The invention provides a bi-component composite fiber. The two components in the bi-component composite fiber comprise a polyester component and a polyamide component. The bi-component composite fiber comprises skeleton parts arranged in a radioactive mode and splinter parts filled in the skeleton parts; the two components form the skeleton parts and the splinter parts respectively; and the polyester component comprises polyester and a fluxing agent, and the fluxing agent accounts for 0.1 to 4 percent of the weight of the bi-component composite fiber. The fluxing agent is mixed into the polyester, and because the fluxing agent can increase the physical bonding strength between the polyester and the polyamide, when the bi-component composite fiber is loosened and carded, the two components can be prevented from performing fiber opening in advance to ensure the smooth progression of non-woven fabric production.
Description
Technical field
The present invention relates to the fibre spinning field, relate in particular to a kind of bicomponent composite fibre and preparation method thereof.
Background technology
Composite fibre is meant by two kinds of polymer, two or more polymer or has the chemical fibre that same polymer of different nature is processed through composite spinning method, on the cross section of fiber, contains two or more immiscible component.Divide according to structure, common composite fibre has parallel type, core-skin type, day star-like, fabric of island-in-sea type, sliver type etc.
Compound islands-in-sea type fibre is mainly used in makes superfine fibre PU synthetic leather.Superfine fibre PU synthetic leather is meant to have the synthetic leather of fiber number less than the ultra-fine fiber construction of 0.33dtex, and therefore this synthetic leather has possessed the hygroscopicity that compares favourably with natural leather owing to brought into play the strong absorptive of superfine fibre.In addition, superfine fibre PU synthetic leather has also surpassed natural leather at aspects such as chemical resistance, mildew-resistant sex change, quality homogeneity and machinabilitys.
In the prior art; Utilize compound islands-in-sea type fibre to prepare superfine fibre PU synthetic leather generally according to following technology: form the compound islands-in-sea type fibre that comprises sea component and island component after at first using the co-blended spinning method with polyester components and polyamide component blend, fusion, extrusion molding, drafting forming, again with said compound islands-in-sea type fibre carry out combing, nonwoven fabric is processed in acupuncture.Then; Using polyurethane that nonwoven fabric is carried out impregnation handles; Be about to polyurethane and be filled in the fibre gap of nonwoven fabric, last again with removal sea component or the island component formation polyester superfine fibre or the superfine polyamide fiber of solvent selectivity, obtain superfine fibre PU synthetic leather.
The subject matter of prior art is: the superfine fiber chemical leather that adopts compound islands-in-sea type fibre method to process can only keep a kind of component fibers; Like nylon (polyamide fiber) or terylene (polyester fiber); And the characteristics of nylon are too soft, and the characteristics of terylene are that rigidity is too strong.Therefore, if when the synthetic leather that obtains at last only keeps the nylon component, though soft, good hand touch, poor rigidity, the i.e. phenomenon of so-called " leather is not endured "; And when only keeping the terylene component, rigidity is too strong, and feel is hardened.In addition, not only environmental pollution is serious for the waste water that produces when adopting a kind of component of removal of solvents, but also has caused the waste of raw material, has increased the unit cost of synthetic leather.
The inventor considers, can use polyester components and the polyamide component bicomponent composite fibre as raw material manufacturing sliver type, then said bicomponent composite fibre is processed nonwoven fabric.When the nonwoven fabric impregnation is handled; Keep polyester components and polyamide component simultaneously; Through follow-up fiber opening process two components are separated again and obtain polyester superfine fibre and superfine polyamide fiber; The deflection that so just can make leather can possess terylene can be taken into account the flexibility of nylon again, but also can reduce the pollution to environment, reduces the leather unit cost.
But, when utilizing the bicomponent composite fibre of the sliver type under the prior art to prepare nonwoven fabric and since the physical bond intensity of polyester and polyamide a little less than; Therefore fiber is being carried out in the process of shredding, combing; Two components of bicomponent composite fibre can be separated in advance, promptly open fibre, bring bigger difficulty will for like this acupuncture step of nonwoven fabric; Cause and can not carry out acupuncture smoothly, even can't ordinary production.
Summary of the invention
In view of this; The technical problem that the present invention will solve is, a kind of bicomponent composite fibre is provided, when using this composite fibre to prepare nonwoven fabric; Can prevent it and in the process of shredding and combing, open fibre in advance, thereby can guarantee carrying out smoothly of nonwoven fabric preparation section.
For solving the problems of the technologies described above; The invention provides a kind of bicomponent composite fibre; Bi-component in the said bicomponent composite fibre is polyester components and polyamide component, and said bicomponent composite fibre comprises the skeleton portion that is the radioactivity arrangement and be filled in the sliver portion in the said skeleton portion that said bi-component forms said skeleton portion and sliver portion respectively; Said polyester components comprises polyester and flux, and said flux accounts for 0.1% ~ 4% of said bicomponent fiber weight.
Preferably, said skeleton portion and said sliver portion are by weight being 15% ~ 30%: 70% ~ 85%.
Preferably, said polyester components forms said skeleton portion, and said polyamide component forms said sliver portion.
Preferably, said polyester components forms said sliver portion, and said polyamide component forms said skeleton portion.
Preferably; Polyester in the said polyester components is selected from PET, polybutylene terephthalate, polytrimethylene terephthalate, poly terephthalic acid-1; 4-hexamethylene dimethyl ester or gather 2; 6-naphthalene diacid second diester is preferably in PET and the polybutylene terephthalate one or more.
Preferably; Said polyamide component is selected from polycaprolactam (PA-6), polyhexamethylene adipamide (PA-66), nylon 46, poly hexamethylene adipamide pentanediamine, polyheptamethylene adipinamide, polyoctamethylene adipamide, polynonamethylene adipamide, polydecamethylene adipamide, is preferably in polycaprolactam and the polyhexamethylene adipamide one or more.
The present invention also provides a kind of method for preparing bicomponent composite fibre, it is characterized in that, comprising:
With said polyester components melting mixing in first screw extruder;
With said polyamide component melting mixing in second screw extruder;
The mixing product of said first screw extruder and the mixing product of said second screw extruder are obtained as-spun fibre through the spinnerets extrusion molding; Said spinnerets comprises a plurality of spinneret orifices; Said spinneret orifice comprises and is skeleton extrusion cavities that radioactivity arranges and by said skeleton extrusion cavities sliver extrusion cavities at interval, and said as-spun fibre comprises skeleton portion of extruding from said skeleton extrusion cavities and the sliver portion that extrudes from said sliver extrusion cavities;
With said as-spun fibre cool off successively, oil, destressing, drawing-off obtain bicomponent composite fibre.
Preferably, said as-spun fibre being carried out always leading of drawing-off doubly is 3 ~ 4 times.
Preferably, the temperature of said cooling is 20 ~ 26 ℃.
Preferably, the said oil content that oils the back fiber is 0.2wt%～0.6wt%.
The invention provides a kind of bicomponent composite fibre; Form by polyester components and polyamide component; Said bicomponent composite fibre comprises the skeleton portion that is the radioactivity arrangement and is filled in the sliver portion in the said skeleton portion; Said bi-component forms said skeleton portion and sliver portion respectively, and said polyester components comprises polyester and flux, and said flux accounts for 0.1% ~ 4% of said bicomponent fiber weight.The present invention mixes said flux in polyester; Because said flux can increase the physical bond intensity between polyester components and the polyamide; Like this when bicomponent composite fibre is carried out shredding, combing; Can prevent that two components from opening fiber in advance, thereby guarantee carrying out smoothly of nonwoven production.
Description of drawings
The sketch map of Fig. 1, bicomponent composite fibre provided by the invention;
Fig. 2, spinneret pore structure sketch map provided by the invention.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, describe just to further specifying feature and advantage of the present invention but should be appreciated that these, rather than to the restriction of claim of the present invention.
The scheme of a preparation bicomponent composite fibre provided by the invention comprises:
With polyester components melting mixing in first screw extruder;
With polyamide component melting mixing in second screw extruder;
The mixing product of said first screw extruder and the mixing product of said second screw extruder are obtained as-spun fibre through the spinnerets extrusion molding; Said spinnerets comprises a plurality of spinneret orifices; Said spinneret orifice comprises and is skeleton extrusion cavities that radioactivity arranges and by said skeleton extrusion cavities sliver extrusion cavities at interval; Said as-spun fibre comprises skeleton portion of extruding from said skeleton extrusion cavities and the sliver portion that extrudes from said sliver extrusion cavities; Said polyester components comprises polyester and flux, and said flux accounts for 0.1% ~ 4% of said bicomponent fiber weight;
With said as-spun fibre cool off successively, oil, destressing, drawing-off obtain bicomponent composite fibre.
According to the present invention; Polyamide in the said polyamide component can be selected for use in the following polymer at least a: polycaprolactam (PA-6), polyhexamethylene adipamide (PA-66), nylon 46, poly hexamethylene adipamide pentanediamine, polyheptamethylene adipinamide, polyoctamethylene adipamide, polynonamethylene adipamide, polydecamethylene adipamide are preferably polycaprolactam and polyhexamethylene adipamide.
According to the present invention; Polyester in the said polyester components can be selected for use in the following polymer at least a: PET, polybutylene terephthalate, polytrimethylene terephthalate, poly terephthalic acid-1; 4-hexamethylene dimethyl ester or gather 2; 6-naphthalene diacid second diester is preferably PET and polybutylene terephthalate.
Said flux is preferably modified resin, like polybutylene terephthalate (PBT) (PBT), polytrimethylene terephthalate (PTT).
According to the present invention, the section of polyester slice and polyamide can be provided respectively, then said polyester slice and polyamide are cut into slices and carry out sending into screw extruder more respectively after the dried and carry out mixing.Said polyester slice baking temperature is 160 ~ 180 ℃, is preferably 165 ~ 175 ℃; The baking temperature of said polyamide is 80 ℃ ~ 100 ℃, more preferably 85 ℃ ~ 95 ℃.The present invention does not have specific (special) requirements to the dry environment of polyester and polyamide, can in drying equipments well known to those skilled in the art such as electric heating convection oven, IR bake, heated-air circulation oven, carry out drying.
After the polyester slice drying; Put into the first screw extruder melting mixing; Said flux can join in said first screw extruder and mix with said polyester, and the melting temperature of first screw extruder is preferably 270 ℃ ~ 295 ℃, more preferably 280 ℃ ~ 290 ℃.Behind the polyamide chip drying, put into the second screw extruder melting mixing, the melting temperature of second screw extruder is preferably 260 ℃ ~ 280 ℃, more preferably 265 ℃ ~ 275 ℃.
The extruder that uses among the present invention can be single screw extrusion machine or double screw extruder, and the diameter of extruder screw is 50mm ~ 130mm, is preferably 60mm ~ 120mm, and draw ratio is 20 ~ 27 to be preferably 22 ~ 25, more elects 23 ~ 24 as; Compression ratio is preferably 3 ~ 4.
Melt in two screw extruders after mixing gets into polyester, polyamide spinning manifold respectively, gets into composite spining module through separately spinning pump.In composite spining module, form compound as-spun fibre through same melt distribution plate, spinnerets, compound as-spun fibre structural representation is as shown in Figure 1, comprises being the fiber reinforcement portion 1 that radioactivity arranges and being filled in the sliver portion 2 between the said fiber reinforcement portion.
According to the present invention, said spinnerets has the spinneret orifice of tangerine flap, and is as shown in Figure 2, is the schematic cross-section of spinneret orifice.Said spinneret orifice 11 cross sectional shapes are circular, comprise a plurality ofly being the skeleton extrusion cavities 11a of radial arrangement and being extruded sliver extrusion cavities 11b at interval by said skeleton.Like this; Two components of said polyester and polyamide can be extruded the formation composite fibre through said skeleton extrusion cavities and said sliver extrusion cavities respectively; The component of extruding from said skeleton extrusion cavities forms the skeleton portion of fiber, and the component of extruding from said sliver extrusion cavities forms the sliver portion of fiber.
According to the present invention, said sliver portion component: the skeleton portion component is by weight being 15% ~ 30%: 70% ~ 85%, more preferably 21% ~ 27%: 73% ~ 79%.Said polyester components can be used as sliver portion, and this moment, polyamide component was as skeleton portion.Said polyester components also can be used as skeleton portion, and this moment, polyamide component was as sliver portion.
According to the present invention, for the quantity of said skeleton extrusion cavities, do not have special restriction, can be 4 ~ 20.In Fig. 2, the quantity of skeleton extrusion cavities is 8, can form the sliver fiber of 8 distinguish like this.
After obtaining compound as-spun fibre, said compound as-spun fibre is carried out cooling and shaping through annular cooling quench device, 15 ℃ ~ 30 ℃ of chilling temperatures, more preferably 18 ℃ ~ 26 ℃, more preferably 20 ℃ ~ 25 ℃.As-spun fibre preferably uses two-sided finish oil disc to carry out oiling the first time after supercooling, and after oiling for the first time, the as-spun fibre oil content preferably accounts for 0.1%～0.6% of total weight of fibers, and more preferably 0.2%～0.5%, more preferably 0.3%～0.4%.Said oiling can be used anion well known to those skilled in the art or non-ionic surface active agent.
Fiber after said the oiling is put into fiber barrel through draw-gear well known to those skilled in the art, in fiber barrel, leaves standstill at least 5 hours to remove internal stress, more preferably leaves standstill more than 10 hours, more preferably leaves standstill more than 18 hours.
With said as-spun fibre in fiber barrel, leave standstill eliminate internal stress after, unify boundling according to the total denier that finished product is required, fiber is carried out drawing-off; Drawing-off is always led and doubly is preferably 2 ~ 5 times; More preferably 3 ~ 4 times, drawing-off progression be preferably 2 grades or more than, each grade drafting multiple is preferably 1.1 times ~ 2 times.Fiber is shaped through curling through after the drawing-off, with the fiber after curling carry out oiling second time, relaxation heat setting, cut-out, packing become sliver fiber type finished product, the control of finished product oil content is preferably less than 0.2% of total weight of fibers.
Oil the said first time and the employed finish of operation that oils for the second time is the silanes finish, be specially following any one or multiple: polysiloxane-based and various modified silane class finish, can reduce the friction between the fiber; Mineral oils can reduce the friction between fiber and the metal; And antistatic type of finish.Before oiling process is chosen in and curls for the second time or the laggard provisional capital of curling is passable.
Relaxation heat setting is meant heat-treats fiber under certain force of strain, make it have the stable size and the technology of form.According to scheme of the present invention, to carry out such processing and can make fiber have stable size, washing shrinkage descends; Eliminate fold, improve crease-resistant ability; Improve the ANTIPILLING ability, the elasticity of fortifying fibre.The temperature of relaxation heat setting is preferably 60 ℃ ~ 100 ℃, and more preferably 70 ℃ ~ 90 ℃, more preferably 75 ℃ ~ 85 ℃.Above-mentioned bicomponent composite fibre provided by the invention; Can be used to prepare nonwoven fabric; After then its impregnation being handled, keep two kinds of components simultaneously, make bi-component separate the superfine fibre PU synthetic leather that obtains containing polyester superfine fibre and superfine polyamide fiber through opening fibre technology then.
During the preparation nonwoven fabric, can make nonwoven fabric according to method well known to those skilled in the art, for example: methods such as needle point method, water acupuncture manipulation, pulp air-flow method, meltblown, loop bonding method, the present invention preferably uses needle point method.Concrete steps are: at first fiber is carried out thick shredding and the shreddings processing of two step of smart shredding, again with the process of the fiber after shredding carding machine carding, again through mechanical lapping; This fiber web gets into needing machine then; The acupuncture of carrying out is repeatedly handled, and finally obtains sliver fiber type nonwoven fabric, and the non-woven fabrics craft requirement is: acupuncture speed 200 pins/minute ~ 400 pins/minute; Depth of needling is: 1mm ~ 11mm, needling density are 3000 pins/cm
2~ 5000 pins/cm
2, density is preferably 0.15g/cm
3～0.25g/cm
3, grammes per square metre is preferably 280g/m
2～600g/m
2
Behind the preparation nonwoven fabric, said nonwoven fabric is carried out the PVA impregnation, drying, the typing of plating again, PVA contains immersion liquid and preferably includes in mass concentration: 1%～3% polyvinyl alcohol, surplus are water.Nonwoven fabric carries out the PU impregnation again after the PVA impregnation, PU fully is filled in the fibre gap, and PU contains immersion liquid and preferably includes in mass: 12%～20% polyurethane, 1%～3.2% surfactant, surplus are water.Again the impregnation cloth after the said PU impregnation is sent in the solidification liquid and solidified, again through washing, the dry fine base cloth of not opening of PU impregnation that finally obtains.Said solidification liquid comprises 29%～39% DMF (dimethyl formamide), the water of surplus in mass.
After nonwoven fabric is not opened fine base cloth through the PU impregnation, can not open fine base cloth and send in the sodium hydroxide solution and soak said, concentration of sodium hydroxide solution be preferably 1-5% in mass.Do not open fine base cloth and send into to be heated in the high temperature steam box after 80-100 ℃ and use 5-20 ℃ cooling water to cool off rapidly said again.Can use ultrasonic Treatment, machinery to rub processing then, high temperature is rubbed operations such as processing and is obtained superfine fibre PU synthetic leather.Said superfine fibre PU synthetic leather can carry out processing such as napping, dyeing, edging, veneer.Use the superfine fibre PU synthetic leather of bicomponent composite fibre manufacturing provided by the invention to contain polyester superfine fibre and superfine polyamide fiber, therefore have the flexibility of polyamide and the hardness of polyester.
In order further to understand the present invention, below in conjunction with embodiment nonwoven fabric provided by the invention is contained leaching method and describe.
In following embodiment and the comparative example, all use with a kind of screw extruder, parameter is following: diameter is 80mm, and draw ratio is 25, and compression ratio is 4.
Get 22 parts to PET section after 170 ℃ of dryings, put into polyester spinning screw extruder at 280 ℃ of melting mixings, add 3 parts of fluxs when mixing, flux is a polybutylene terephthalate (PBT); Get 75 parts of polycaprolactam sections and after 85 ℃ of dryings, put into polyamide spinning screw extruder at 270 ℃ of melting mixings.
The mixing product of two screw extruders is obtained as-spun fibre through 8 distinguish spinnerets extrusion moldings as shown in Figure 2; Following examples all adopt this spinnerets extrusion molding; Obtain the as-spun fibre of 8 distinguish; Said as-spun fibre is made up of fiber reinforcement portion and the sliver portion that is filled between the said fiber reinforcement, and wherein fiber reinforcement portion composition is a PET, and sliver portion composition is a polycaprolactam;
Then said as-spun fibre is carried out cooling and shaping through annular cooling quench device; 22 ℃ of chilling temperatures; Oil through two-sided finish oil disc, finish is the 4wt% silicone emulsion again, and the oil content after fiber oils is 0.4%; Get into fiber barrel through traction, feeding unit, leave standstill and eliminated internal stress in 10 hours;
Then with said fiber successively through after 1.7 times, 2.1 times the drawing-off, get into crimping machine and carry out machine crimp and be shaped, the fiber after curling oils, finish is the 4wt% silicone emulsion; The staple fibre, the packing that carry out relaxation heat setting then, are cut into 50mm become finished product, and the finished product oil content is less than 0.2wt%, and the relaxation heat setting temperature is 70 ℃, measures fibre property such as table 1.
Use polyester, flux, the polyamide identical with embodiment 1 among above-mentioned four embodiment, specifically technological parameter is seen table 2:
Measure embodiment 2 to 5 performances, list in table 1.
Embodiment 6
The fiber that goes embodiment 1 to 5 to process is promptly processed nonwoven fabric through shredding, combing, acupuncture, in the process of nonwoven fabric preparation, does not all produce and opens fine phenomenon in advance, and non-woven fabrics craft requires and performance such as table 3, is QB/T2888-2007.
The composite fibre mechanical property of table 1, embodiment of the invention preparation
Table 2 embodiment 2 is to ~ embodiment 5 technological parameters
The nonwoven fabric mechanical property of table 3, embodiment of the invention preparation
Comparative example 1
Get 25 parts to PET section after 170 ℃ of dryings, put into polyester spinning screw extruder at 280 ℃ of melting mixings; Get the section of 75 parts of polycaprolactams and after 85 ℃ of dryings, put into polyamide spinning screw extruder at 280 ℃ of melting mixings, other technology is identical with embodiment 1, obtain fiber after, by and the used identical standard of table 1, it is following to test the fibre property performance:
Fiber number: average is 2.38dtex, and deviation is+5.1; Fracture strength: average is 4.57, and the CV value is 3.5%; Extension at break: average is 33.%, and the CV value is 6.8%; Crimp property: curling number is 13.5/25cm, and crimp percent is 11.1%; Length: average is 50.0mm, and deviation is-2%; The over-length fibre rate: 0, fault content 0; Less than 5.6≤Ω cm, regain is 0.83% than resistance.
With the fiber production nonwoven fabric, in carding process, produce and open fine problem, produce a large amount of ball tops during acupuncture.
Comparative example 2
Get 75 parts to PET section after 176 ℃ of dryings, put into polyester spinning screw extruder at 280 ℃ of melting mixings; Get the section of 25 parts of polycaprolactams and after 88 ℃ of dryings, put into polyamide spinning screw extruder at 270 ℃ of melting mixings, other technology is identical with embodiment 4, obtain fiber after, by and the used identical standard of table 1, it is following to test fibre property:
Fiber number: average is 2.35dtex, and deviation is+5.3; Fracture strength: average is 4.56cN/dtex, and the CV value is 3.4%; Extension at break: average is 33.4%, and the CV value is 6.7%; Crimp property: curling number is 13.6/25cm, and crimp percent is 11.5%; Length: average is 50.0mm, and deviation is-2%; The over-length fibre rate: 0, fault content 0; Less than 5.8≤Ω cm, regain is 0.86% than resistance.
With the fiber production nonwoven fabric, in carding process, produce and open fine problem, produce a large amount of ball tops during acupuncture.
More than bicomponent composite fibre provided by the invention and preparation method thereof has been carried out detailed introduction.Used concrete example among this paper principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. bicomponent composite fibre that is used to make the PU synthetic leather; It is characterized in that; Bi-component in the said bicomponent composite fibre is polyester components and polyamide component; Said bicomponent composite fibre comprises and is skeleton portion that radioactivity arranges and is filled in the sliver portion in the said skeleton portion that said bi-component forms said skeleton portion and sliver portion respectively, and said polyester components comprises polyester and flux; Said flux is polybutylene terephthalate (PBT) or polytrimethylene terephthalate, and said flux accounts for 0.1% ~ 4% of said bicomponent fiber weight.
2. bicomponent composite fibre according to claim 1 is characterized in that, said skeleton portion and said sliver portion are by weight being: 15% ~ 30%: 70% ~ 85%.
3. bicomponent composite fibre according to claim 1 is characterized in that said polyester components forms said skeleton portion, and said polyamide component forms said sliver portion.
4. bicomponent composite fibre according to claim 1 is characterized in that, said polyester components forms said sliver portion, and said polyamide component forms said skeleton portion.
5. according to each described bicomponent composite fibre of claim 1 to 4; It is characterized in that; Polyester in the said polyester components is selected from PET, polybutylene terephthalate, polytrimethylene terephthalate, poly terephthalic acid-1; 4-hexamethylene dimethyl ester with gather 2, one or more in the 6-naphthalene diacid second diester.
6. according to each described bicomponent composite fibre of claim 1 to 4; It is characterized in that said polyamide component is selected from one or more in polycaprolactam (PA-6), polyhexamethylene adipamide (PA-66), nylon 46, poly hexamethylene adipamide pentanediamine, polyheptamethylene adipinamide, polyoctamethylene adipamide, polynonamethylene adipamide and the polydecamethylene adipamide.
7. a method for preparing each described bicomponent composite fibre of claim 1 to 6 is characterized in that, comprising:
With said polyester components melting mixing in first screw extruder;
With said polyamide component melting mixing in second screw extruder;
The mixing product of said first screw extruder and the mixing product of said second screw extruder are obtained as-spun fibre through the spinnerets extrusion molding; Said spinnerets comprises a plurality of spinneret orifices; Said spinneret orifice comprises and is skeleton extrusion cavities that radioactivity arranges and by said skeleton extrusion cavities sliver extrusion cavities at interval, and said as-spun fibre comprises skeleton portion of extruding from said skeleton extrusion cavities and the sliver portion that extrudes from said sliver extrusion cavities;
With said as-spun fibre cool off successively, oil, destressing, drawing-off obtain bicomponent composite fibre.
8. preparation method according to claim 7 is characterized in that, it doubly is 3 ~ 4 times that said as-spun fibre is carried out always leading of drawing-off.
9. preparation method according to claim 7 is characterized in that, the temperature of said cooling is 20 ~ 26 ℃.
10. preparation method according to claim 7 is characterized in that, the said oil content that oils the back fiber is 0.2wt%～0.6wt%.
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| CN112680826A (en) * | 2019-10-18 | 2021-04-20 | 上海凯赛生物技术股份有限公司 | Polyamide sea-island fiber and preparation method and application thereof |
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| CN113445141A (en) * | 2021-07-13 | 2021-09-28 | 广东大红马纺织新材料有限公司 | Polyethylene and polyamide 6 composite spinning production line and composite spinning process |
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| CN1144853A (en) * | 1995-09-08 | 1997-03-12 | 岳阳石油化工总厂研究院 | New spinning technology for composite superthin polypropylene fibre |
| CN1552963A (en) * | 2003-05-30 | 2004-12-08 | 厦门翔鹭化纤股份有限公司 | Processing method for producing sea-island fibre POY based on sea-island fibre FDY producing apparatus |
| CN101429689A (en) * | 2008-11-27 | 2009-05-13 | 无锡海丝路纺织新材料有限公司 | Superfine fibre material and producing method thereof |
| CN101487151A (en) * | 2009-02-19 | 2009-07-22 | 太仓荣文合成纤维有限公司 | Antibacterial terylene-brocade composite superfine fibre and preparation |
| CN101503835A (en) * | 2009-03-09 | 2009-08-12 | 常熟市海欣复合材料有限公司 | Preparation of 0.06D ultra-fine polyester-nylon complex fiber |
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