CN108138379A - A kind of parallel composite fiber - Google Patents
A kind of parallel composite fiber Download PDFInfo
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- CN108138379A CN108138379A CN201780003396.7A CN201780003396A CN108138379A CN 108138379 A CN108138379 A CN 108138379A CN 201780003396 A CN201780003396 A CN 201780003396A CN 108138379 A CN108138379 A CN 108138379A
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- inherent viscosity
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- 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
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- 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
- D01D5/28—Formation of filaments, threads, or the like while mixing different spinning solutions or melts during the spinning operation; Spinnerette packs therefor
- D01D5/30—Conjugate filaments; Spinnerette packs therefor
- D01D5/32—Side-by-side structure; Spinnerette packs therefor
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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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- Multicomponent Fibers (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
The invention discloses a kind of parallel composite fibers, and the polyester that the polybutylene terephthalate (PBT) which is 1.00~2.00dl/g by inherent viscosity is 0.45~0.65dl/g with inherent viscosity is with 70: 30~30：70 weight ratio is made after carrying out composite spinning arranged side by side through false twisting processing, wherein, the inherent viscosity difference of polybutylene terephthalate (PBT) and polyester is 0.35~1.55dl/g, and the elastic extension of the fiber is 20~129%, and elastic recovery rate is more than 65%.
Description
The present invention relates to a kind of parallel composite fiber that elasticity is good, in particular to a kind of bicomponent elastic fibers containing polybutylene terephthalate (PBT).
Parallel composite fiber is the composite fibre kind that exploitation is earliest, yield is larger, important, and initial people mainly want the crimpiness elasticity that natural wool is simulated with chemical fibre in research, exploitation composite fibre.As people deepen continuously to microstructure, it is found that the cross section of wool is different from other natural fibers, it be by be approximately two semicircles, the orthocortex and paracortex that hold tightly together are constituted each other.The property of this two-part various structural unit (fento crystal region and region of disorder etc.) and arrangement are different.It is smaller in drying regime paracortex shrinkage ratio orthocortex, therefore cause axially to surround mutually along fiber or rive off mutually, and spiral helicine main body curling is presented.It is crimped naturally with height and the parallel composite fiber of bulkiness is exactly to succeed in developing under the bionical enlightenment of wool class angle protein fiber.The preparation method of this composite fibre is: by the different two kinds of polymer of thermal expansion and contraction or wet swell-shrink characteristic, as two kinds of cortex of sheepskin, being spun into a single fiber side by side, is allowed to shrink by heating, can be obtained by spiral helicine conjugate in this way.Since the inwardness of fiber is come from this curling, thus it is different by the external curling and deformation for applying heat and mechanism formation from general fiber, and this curling is permanent.
Since the 21th century, this side-by-side elastic fiber is more and more paid close attention to by people, also gradually occupies very important position in chemical fibre field.It, which has from crimp property, can produce spiral three-dimensional crimp based on the different shrinkage of two components in composite fibre.Its advantage is that bulkiness is big, elasticity and recovery are good, excellent touch.
China application CN1962968A discloses a kind of preparation method and application of PBT/PET 3-D crimped fiber, the PET polyethylene terephthalate slice for using inherent viscosity to be 0.64dl/g with inherent viscosity for the PBT polybutylene terephthalate (PBT) of 1.00dl/g slice is raw material, PBT watery fusion high temperature squeezes out, PET high-temperature fusion low temperature squeezes out, collateral fiber undrawn yarn is obtained by parallel type composite component, undrawn yarn is stretched through balance, boundling, immersion oil water-bath, is oiled, is cut off and relaxation heat setting obtains PBT/PET 3-D crimped fiber.It is combined by the PBT of both inherent viscosities with PET, the elastomer obtained by extending cutting, but since inherent viscosity difference is smaller, and PET inherent viscosity is big, the potential shrinking percentage of fiber is not high, and higher elastic extension and elastic recovery rate cannot be obtained after extension.
Chinese patent CN101851812A discloses a kind of parallel composite fiber formed by polybutylene terephthalate (PBT) and polyethylene terephthalate, and inherent viscosity difference between the two is 0.40~1.05dl/g, extends false twisting by barrier type spinneret extrusion molding arranged side by side, hot needle and processes to obtain elastic extension to be 130~220%, elastomer of the elastic recovery rate 85% or more.But since this application uses hot needle to extend false twisting processing, i.e. so-called outer false twisting, obtained elastic fiber its elongation is relatively excessively high, to forming corrugations easily occur after its fabric tension, though because there is higher elastic recovery rate that can suitably reply, but its appearance is influenced, its use scope is limited.
Chinese patent CN1854355A discloses a kind of cation dyeable copolyester component and polyethylene terephthalate component compound parallel composite fiber side by side, but the inherent viscosity of cation dyeable copolyester component and polyethylene terephthalate component is not much different in the fiber, differences in viscosity only has 0.02~0.10, and fiber does not have good shrinkage.
Summary of the invention
A kind of the purpose of the present invention is to provide elasticity moderate, bicomponent elastic fiber that elastic recovery rate is good and preparation method thereof.
The technical solution of the invention is as follows:
A kind of parallel composite fiber, the polyester that the polybutylene terephthalate (PBT) and inherent viscosity which is 1.00~2.00dl/g by inherent viscosity are 0.45~0.65dl/g are made after carrying out composite spinning arranged side by side with 70: 30~30: 70 weight ratio through false twisting processing；Wherein,
The inherent viscosity difference of polybutylene terephthalate (PBT) and polyester is 0.35~1.55dl/g, and the elastic extension of the fiber is 20~129%, and elastic recovery rate is 65% or more.
A preferred technical solution is that the polyester is polyethylene terephthalate, and the inherent viscosity of the polybutylene terephthalate (PBT) is 1.00~1.80dl/g；The filament number of parallel composite fiber is 0.45~7.00dtex.
Another preferred technical solution is that the polyester is cation dyeable copolyester, and the inherent viscosity of the polybutylene terephthalate (PBT) is 1.00~1.50dl/g；Containing the structural unit formed by the M-phthalic acid or derivatives thereof with sodium group in the cation dyeable copolyester, the structural unit accounts for 0.20~1.00wt% of cation dyeable copolyester in terms of element sulphur；Described M-phthalic acid with sodium group or derivatives thereof is 5-sodium sulfo isophthalate, Sodium Dimethyl Isophthalate-5-sulfonate or ethylene isophthalate -5- sodium sulfonate；The fiber is after cation stain, and color emissivity L value is below 16.0.
Inherent viscosity difference preferably 0.4~1.05dl/g of the polybutylene terephthalate (PBT) and polyester.
The invention has the advantages that conventional polybutylene terephthalate (PBT) fiber is higher due to being sliced price, thus the scope of application is restricted, and the elastic extension of single composition polybutylene terephthalate (PBT) fiber is higher, but elastic recovery rate is poor.It is combined using polybutylene terephthalate (PBT) with polyester to manufacture elastomer, the decline of fibrous raw material cost improves elastic recovery rate in the case where guaranteeing that elastic extension is moderate.Crimped filament is processed using false twisting, first is that the natural curling that two compositional viscosity differences generate, it is that fibre structure determines, thus has permanent；Second is that false twisting, which is processed, adds bullet to fibrous physics, thus elasticity more better than extension silk can be obtained.The elastic extension of the elastomer produced by this technology is 20~129%, and elastic recovery rate is 65% or more.
Fig. 1 is the circular section shape figure of parallel composite elastic fiber of the present invention.
Fig. 2 is double benevolence peanut cross-sectional profile figures of parallel composite elastic fiber of the present invention.
Parallel composite fiber of the invention, the fiber are to be made after the polyester of 0.45~0.65dl/g carries out composite spinning arranged side by side with 70: 30~30: 70 weight ratio through false twisting processing by the polybutylene terephthalate (PBT) (PBT) that inherent viscosity is 1.00~2.00dl/g and inherent viscosity；Wherein, the inherent viscosity difference of polybutylene terephthalate (PBT) and polyester is 0.35~1.55dl/g, and the elastic extension of the fiber is 20~129%, and elastic recovery rate is 65% or more.
The inherent viscosity for selecting polyester is 0.45~0.65dl/g, this is because if combined using the excessively high polyester of inherent viscosity with polybutylene terephthalate (PBT), the collateral fiber that obtains through melt composite spinning and the fabric elasticity elongation obtained by the fiber are poor, if combined using the too low polyester of inherent viscosity with polybutylene terephthalate (PBT), the collateral fiber performance boost then obtained by composite spinning is not high, and cost improves, spinnability is deteriorated.Polyester mentioned by this patent includes polyethylene terephthalate (PET), polypropylene terephthalate (PPT), polybutylene terephthalate (PBT) (PBT) and their modified copolyester.It is illustrated with polyethylene terephthalate, its modified copolymer can be the polyethylene terephthalate that copolymer composition modification or blending and modifying are added to well known to cationic polyethylene terephthalate, fire retardant polyethylene terephthalate, full-dull polyethylene terephthalate etc..
The polybutylene terephthalate (PBT) for being 0.35~1.55dl/g with the inherent viscosity difference of polyester is selected, this is because inherent viscosity difference is lower than 0.35dl/g, then fibrous elasticity is unobvious；Inherent viscosity difference increases, then elastic property improves, after differences in viscosity is higher than 1.55dl/g, elastic property improves degree and reduces, and high viscosity difference will lead to spinnability variation, spinneret aperture curvature effect becomes larger, difficulty in spinning, therefore select inherent viscosity difference appropriate for 0.35~1.55dl/g, preferred characteristics differences in viscosity is 0.40~1.05dl/g.
The intrinsic viscosity range for the polybutylene terephthalate (PBT) that the present invention uses is 1.00~2.00dl/g.If the inherent viscosity of polybutylene terephthalate (PBT) is greater than 2.00dl/g, melt composite spinning difficulty will lead to, and be sliced cost and will increase；If the inherent viscosity of polybutylene terephthalate (PBT) is less than 1.00dl/g, then it will affect fibrous physical property, the elasticity of gained parallel composite fiber is also unobvious.The polybutylene terephthalate (PBT) includes polybutylene terephthalate (PBT) and its copolyesters, such as cation-dyeable type poly terephthalic acid
Butanediol ester etc..
In order to consider the cost and elastic property of parallel composite fiber of the present invention, select the weight ratio of polybutylene terephthalate (PBT) and polyester for 70:30~30:70.
From elasticity it is moderate from the point of view of, the elastic extension of elastomer of the invention is 20~129%, and elastic recovery rate is 65% or more.
Elastomer cross sectional shape of the invention can be peanut shaped etc. for circle, double benevolence.It is circle it is advantageous to cross sectional shape because being false-twisted fiber.Spinneret of the invention is barrier type or rear confluent type composite spinneret, barrier type composite spinneret and because spinneret orifice have baffle design, two component polymers bond after spinneret orifice, aperture curvature effect reduces, spinnability improves, and its fibre section shape is circle, elasticity and recovery are good, thus preferably.Confluent type composite spinneret afterwards, obtained fibre section shape are that double benevolence are peanut shaped.Relative to rear confluent type composite spinneret, the manufacturing price of barrier type composite spinneret wants expensive, and confluent type composite spinneret will be got well after cost aspect.
In the case where meeting 1.00~2.00dl/g of above-mentioned polybutylene terephthalate (PBT) inherent viscosity of the invention, 0.45~0.65dl/g of polyester inherent viscosity, polybutylene terephthalate (PBT) and 0.35~1.55dl/g of differences in viscosity of polyester, the weight ratio 70: 30~30: 70 of polybutylene terephthalate (PBT) and polyester, the elastic extension 20~129% of fiber, 65% or more elastic recovery rate, the present invention also provides two preferred technical solutions.
Optimal technical scheme A:
The polyester is polyethylene terephthalate, and the inherent viscosity of the polybutylene terephthalate (PBT) is preferably advisable in the range of 1.00~1.80dl/g at this time.When the viscosity of polybutylene terephthalate (PBT) is excessively high, spinnability is deteriorated, and higher spinning temperature is needed to carry out spinning, is deteriorated to will lead to gained fibrous physical property.
Due to the difference of demand and purposes, the preferably filament number range of fiber is 0.45~7.00dtex, and in the composite fibre of this range, fiber number can meet multiple use by 12 to 72 by 33dtex to 167dtex, single fiber-bundles radical.
The manufacturing method of optimal technical scheme A, the polyethylene terephthalate slice for being specifically 0.45~0.65dl/g by inherent viscosity, and the polybutylene terephthalate (PBT) that inherent viscosity is 1.00~1.80dl/g is sliced, it is separately dried to moisture 100ppm or less, it is respectively fed to A and B screw rod melting extrusion, wherein the melting extrusion temperature of polybutylene terephthalate (PBT) is 245~285 DEG C, and temperature is lower, and elastomer elastic property is better；The melting extrusion temperature of polyethylene terephthalate is 275~300 DEG C, then under the conditions of 265~295 DEG C of spinning body temperature, pass through metering pump, through barrier type or after confluent type composite spinneret extrusion molding, it is batched under conditions of speed is 2000~5000m/min, it then is 170~210 DEG C in false twisting processing temperature, it is 1.20~2.50 that multiplying power is processed in false twisting, process velocity is 300~800m/min, and parallel composite elastic fiber is made under conditions of navel false twisting, belt false twisting or pin type false twisting.
Parallel composite fiber elongation described in optimal technical scheme A of the present invention is 25% or more, and breaking strength is in 2.0cN/dtex or more, and elastic extension is 25%~129%, and elastic recovery rate is 65% or more.
Optimal technical scheme B:
The polyester is cation dyeable copolyester, and the inherent viscosity of the polybutylene terephthalate (PBT) is preferably advisable in the range of 1.00~1.50dl/g at this time.
Containing the structural unit formed by the M-phthalic acid or derivatives thereof with sodium group in the cation dyeable copolyester, the content of the structural unit preferably accounts for 0.20~1.00wt% of cation dyeable copolyester in terms of element sulphur.When the content of the structural unit in cation dyeable copolyester is too small, gained parallel composite fiber does not have cation dyeable；When the content of the structural unit in cation dyeable copolyester is too high, gained parallel composite fiber physical property declines, and practical application is poor.In order to make parallel composite fiber obtain ideal cation-dyeable characteristic, its more preferable content accounts for 0.25%~0.80wt% of cation dyeable copolyester in terms of element sulphur.
The M-phthalic acid or derivatives thereof with sodium group, preferably 5-sodium sulfo isophthalate, Sodium Dimethyl Isophthalate-5-sulfonate or ethylene isophthalate -5- sodium sulfonate.
When the polyester is cation dyeable copolyester, due to the presence of the structural unit formed in polyester segment by the M-phthalic acid or derivatives thereof with sodium group, the spinnability and gained fibrous physical property of polyester can be reduced.Therefore, it is necessary to the polybutylene terephthalate (PBT) and cation dyeable copolyester composite spinning arranged side by side of proper characteristics viscosity are chosen in spinning.Preferred characteristics viscosity of the present invention is
The polybutylene terephthalate (PBT) of 1.00~1.50dl/g, can spinnability be excellent and the physical property of gained fiber is good.
Cation dyeable copolyester slice and inherent viscosity that inherent viscosity is 0.45~0.65dl/g are specifically 1.00~1.50dl/g polybutylene terephthalate (PBT) slice, are separately dried to moisture 80ppm or less by the manufacturing method of optimal technical scheme B；Then it is respectively fed to A and B screw rod melting extrusion, wherein the extrusion temperature of cation dyeable copolyester slice is 265~285 DEG C, 245~285 DEG C of the extrusion temperature of polybutylene terephthalate (PBT), and temperature is lower, and the elastic property of collateral fiber is better；Finally under the conditions of 265~295 DEG C of spinning body temperature, by measuring pump-metered, by parallel type spinneret extrusion molding.During the preparation process, extension silk can be made up of one-step method；Preoriented yarn first can also be made under conditions of speed is 2000~5000m/min, then false twisting is carried out to it and is processed into parallel type composite elastic fiber.False twisting processing includes interior drawing-off and outer drawing-off.
Parallel composite fiber elongation described in optimal technical scheme B of the present invention is 25% or more, and breaking strength is in 2.0cN/dtex or more, and elastic extension is 25%~100%, and elastic recovery rate is 65% or more；After cationic dyeing, the color emissivity L value of fiber is below 16.0.
In the present invention, obtained parallel composite fiber is evaluated using the following method.
(1) spinnability
Spinning situation in spinning 2 hours is evaluated by following method, no fracture of wire is denoted as zero, have a △ that is denoted as of a small amount of fracture of wire (1~3 time), fracture of wire frequently being denoted as of (4 times or more) ×, wherein zero and △ is determined as qualification.
(2) intensity, elongation, the strength and elongation product of fiber
It is tested according to national standard GB14344, strength and elongation product=intensity × (elongation)0.5, stress/fiber number (cN/dtex) of maximum fracture point when intensity is fibre stress-strained tensile, elongation is the strain (%) of fiber maximum fracture point.10 samples are taken to be tested respectively, final result is averaged.
(3) the sulfur content measurement in cation dyeable copolyester
6g cation dyeable copolyester is pressed into sheet, the intensity for measuring it with fluorescent x-ray analysis apparatus (3270 type of X-Ray Analyzer that electric corporation of science manufactures) is converted with the detection line that the sample of known metal content is made in advance.
(4) color emissivity
After yarn is made into cylinder volume object, by cation stain processing, (dye strength measures the tone Lab value of fabric relative to fabric 5wt%).Color emissivity is characterized with tone L value.L value is lower, and color emissivity is better.
(5) inherent viscosity (dl/g)
Make flux with o-chlorphenol, 0.8g polymer is dissolved in 10ml, is measured at 25 DEG C with the automatic viscosity measurement device of scientific society.
(6) elastic extension and elastic recovery rate
The elastic extension that refers in this specification, elastic recovery rate measuring method are referring to JIS L1090-1992 standard test.
Below with reference to embodiment, the present invention will be further described.
Embodiment 1
Fusion method prepares bicomponent elastic fiber, chooses the polybutylene terephthalate (PBT) that inherent viscosity is 1.31dl/g and the polyethylene terephthalate that inherent viscosity is 0.51dl/g carries out composite spinning, their inherent viscosity difference is 0.80dl/g.Be separately dried, its moisture made to be less than 100ppm, by after drying polybutylene terephthalate (PBT) and polyethylene terephthalate No. 1/No. 2 manifolds are put into respectively with 50: 50 weight ratio.Setting spinning temperature, No. 1 265 DEG C of extruder screw temperature；No. 2 285 DEG C of spinning machine extruder temperature；Spinning body temperature is 270 DEG C.It is spun using parallel type spinneret, sets winding speed as 2500m/min, control precursor kind 300dtex/48F.
Navel false twisting processing is carried out to the preoriented yarn of winding, 190 DEG C of heater temperature, false twisting multiplying power sets 1.85, extension speed 500m/min.Final DTY kind 167dtex/48F, filament number 3.48dtex.
DTY silk intensity, elongation, elastic extension, elastic recovery rate after measuring false twisting.Specific value is shown in Table 1.
Embodiment 2
Using polymer weight ratio same as Example 1, spinning temperature, spinning speed, precursor kind, processing method, processing temperature,
Process multiplying power, process velocity, but the inherent viscosity for changing two kinds of polymer is poor, it chooses the polybutylene terephthalate (PBT) that inherent viscosity is 1.50dl/g and the polyethylene terephthalate that inherent viscosity is 0.45dl/g carries out composite spinning, their inherent viscosity difference is 1.05dl/g.Specific value is shown in Table 1.
Embodiment 3
Using polymer weight ratio same as Example 1, spinning temperature, spinning speed, precursor kind, processing method, processing temperature, processing multiplying power, process velocity, but the inherent viscosity for changing two kinds of polymer is poor, it chooses the polybutylene terephthalate (PBT) that inherent viscosity is 1.00dl/g and the polyethylene terephthalate that inherent viscosity is 0.60dl/g carries out composite spinning, their inherent viscosity difference is 0.40dl/g.Specific value is shown in Table 1.
Embodiment 4
Using the polymer of inherent viscosity same as Example 1, spinning temperature, spinning speed, precursor kind, processing method, processing temperature, processing multiplying power, process velocity, but change the weight ratio of two kinds of polymer.The weight ratio of polybutylene terephthalate (PBT) and polyethylene terephthalate has become 70: 30 at 50: 50.Specific value is shown in Table 1.
Embodiment 5
Using the polymer of inherent viscosity same as Example 1, spinning temperature, spinning speed, precursor kind, processing method, processing temperature, processing multiplying power, process velocity, but change the weight ratio of two kinds of polymer.The weight ratio of polybutylene terephthalate (PBT) and polyethylene terephthalate has become 30: 70 at 50: 50.Specific value is shown in Table 2.
Embodiment 6
Using the polymer of inherent viscosity same as Example 1, polymer weight ratio, spinning speed, precursor kind, processing method, processing temperature, processing multiplying power, process velocity, but change the spinning temperature and false twisting mode of polybutylene terephthalate (PBT).The extruder temperature of polybutylene terephthalate (PBT) is reduced to 245 DEG C by 265 DEG C.Specific value is shown in Table 2.
Embodiment 7
Using the polymer of inherent viscosity same as Example 1, polymer weight ratio, spinning temperature, processing method, processing temperature, process velocity, but change spinning speed.Spinning speed rises to 4000m/min by 2500m/min.Precursor kind accordingly becomes 200dtex/48F, and multiplying power becomes 1.20, and final DTY kind is still 167dtex/48F.Specific value is shown in Table 2.
Embodiment 8
Using the polymer of inherent viscosity same as Example 1, polymer weight ratio, spinning temperature, spinning speed, processing method, processing temperature, processing multiplying power, process velocity, but change precursor kind is 60dtex/72F, final DTY kind 33dtex/72F, filament number 0.46dtex.Specific value is shown in Table 2.
Embodiment 9
Using the polymer of inherent viscosity same as Example 1, polymer weight ratio, spinning temperature, spinning speed, processing method, processing temperature, processing multiplying power, process velocity, but change false twisting mode, change precursor kind is 300dtex/24F, final DTY kind 167dtex/24F, filament number 6.96dtex.Specific value is shown in Table 3.
Embodiment 10
Using the polymer of inherent viscosity same as Example 1, polymer weight ratio, spinning temperature, spinning speed, precursor kind, processing method, processing multiplying power, process velocity, but change processing temperature.Heater temperature rises to 210 DEG C by 190 DEG C.Specific value is shown in Table 3.
Embodiment 11
Using the polymer of inherent viscosity same as Example 1, polymer weight ratio, spinning temperature, spinning speed, precursor kind, processing method, processing multiplying power, process velocity, but use rear confluent type composite spinneret.Fiber cross-sectional is double shelled peanut shapes.Specific value is shown in Table 3.
Comparative example 1
Using polymer weight ratio same as Example 1, spinning temperature, spinning speed, precursor kind, processing method, processing temperature, processing multiplying power, process velocity, but the inherent viscosity for changing two kinds of polymer is poor, chooses the poly terephthalic acid fourth that inherent viscosity is 1.31dl/g
The polyethylene terephthalate that diol ester and inherent viscosity are 0.68dl/g carries out composite spinning, their inherent viscosity difference is 0.63dl/g.Specific value is shown in Table 4.
Comparative example 2
Using the polymer of inherent viscosity same as Example 1, polymer weight ratio, spinning temperature, spinning speed, precursor kind, processing temperature, processing multiplying power, process velocity, but change processing method, it is processed using hot needle, also hot tank is used, heater temperature is same as Example 1, is 190 DEG C.Specific value is shown in Table 4.
Table 1
| Project | Unit | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 |
| POY kind | - | 300dtex-48F | 300dtex-48F | 300dtex-48F | 300dtex-48F |
| PBT inherent viscosity | dl/g | 1.31 | 1.50 | 1.00 | 1.31 |
| PET inherent viscosity | dl/g | 0.51 | 0.45 | 0.60 | 0.51 |
| Inherent viscosity is poor | dl/g | 0.80 | 1.05 | 0.40 | 0.80 |
| PBT/PET mass ratio | - | 50/50 | 50/50 | 50/50 | 70/30 |
| PBT spinning temperature | ℃ | 265 | 265 | 265 | 265 |
| PET spinning temperature | ℃ | 285 | 285 | 285 | 285 |
| Spinning speed | m/min | 2500 | 2500 | 2500 | 2500 |
| DTY kind | - | 167dtex-48F | 167dtex-48F | 167dtex-48F | 167dtex-48F |
| Filament number | dtex | 3.48 | 3.48 | 3.48 | 3.48 |
| DTY multiplying power | - | 1.85 | 1.85 | 1.85 | 1.85 |
| False twisting mode | - | Navel | Navel | Navel | Navel |
| Heater temperature | ℃ | 190 | 190 | 190 | 190 |
| Process velocity | m/min | 500 | 500 | 500 | 500 |
| DTY intensity | cN/dtex | 3.32 | 3.02 | 3.61 | 3.54 |
| DTY elongation | % | 22.6 | 20.4 | 21.9 | 19.7 |
| DTY elastic extension | % | 65.0 | 80.0 | 40.0 | 50.0 |
| DTY elastic recovery rate | % | 88.0 | 85.0 | 92.0 | 90.0 |
| Cross sectional shape | - | It is round | It is round | It is round | It is round |
Table 2
| Project | Unit | Embodiment 5 | Embodiment 6 | Embodiment 7 | Embodiment 8 |
| POY kind | - | 300dtex-48F | 300dtex-48F | 200dtex-48F | 60dtex-72F |
| PBT inherent viscosity | dl/g | 1.31 | 1.31 | 1.31 | 1.31 |
| PET inherent viscosity | dl/g | 0.51 | 0.51 | 0.51 | 0.51 |
| Inherent viscosity is poor | dl/g | 0.80 | 0.80 | 0.80 | 0.80 |
| PBT/PET mass ratio | - | 30/70 | 50/50 | 50/50 | 50/50 |
| PBT spinning temperature | ℃ | 265 | 245 | 265 | 265 |
| PET spinning temperature | ℃ | 285 | 285 | 285 | 285 |
| Spinning speed | m/min | 2500 | 2500 | 4000 | 2500 |
| DTY kind | - | 167dtex-48F | 167dtex-48F | 167dtex-48F | 33dtex-72F |
| Filament number | dtex | 3.48 | 3.48 | 3.48 | 0.46 |
| DTY multiplying power | - | 1.85 | 1.85 | 1.20 | 1.85 |
| False twisting mode | - | Navel | Apron | Navel | Navel |
| Heater temperature | ℃ | 190 | 190 | 190 | 190 |
| Process velocity | m/min | 500 | 500 | 500 | 500 |
| DTY intensity | cN/dtex | 3.18 | 3.41 | 3.30 | 3.74 |
| DTY elongation | % | 22.2 | 20.7 | 23.5 | 20.7 |
| DTY elastic extension | % | 45.0 | 65.0 | 55.0 | 60.0 |
| DTY elastic recovery rate | % | 91.0 | 87.0 | 92.0 | 85.0 |
| Cross sectional shape | It is round | It is round | It is round | It is round |
Table 3
| Project | Unit | Embodiment 9 | Embodiment 10 | Embodiment 11 |
| POY kind | - | 300dtex-24F | 300dtex-48F | 300dtex-48F |
| PBT inherent viscosity | dl/g | 1.31 | 1.31 | 1.31 |
| PET inherent viscosity | dl/g | 0.51 | 0.51 | 0.51 |
| Inherent viscosity is poor | dl/g | 0.80 | 0.80 | 0.80 |
| PBT/PET mass ratio | - | 50/50 | 50/50 | 50/50 |
| PBT spinning temperature | ℃ | 265 | 265 | 265 |
| PET spinning temperature | ℃ | 285 | 285 | 285 |
| Spinning speed | m/min | 2500 | 2500 | 2500 |
| DTY kind | - | 167dtex-24F | 167dtex-48F | 167dtex-48F |
| Filament number | dtex | 6.96 | 3.48 | 3.48 |
| DTY multiplying power | - | 1.85 | 1.85 | 1.85 |
| False twisting mode | - | Pin type | Navel | Navel |
| Heater temperature | ℃ | 190 | 210 | 210 |
| Process velocity | m/min | 500 | 500 | 500 |
| DTY intensity | cN/dtex | 3.15 | 3.22 | 3.16 |
| DTY elongation | % | 21.7 | 22.8 | 24.5 |
| DTY elastic extension | % | 63.0 | 75.0 | 68.0 |
| DTY elastic recovery rate | % | 89.0 | 86.0 | 83.0 |
| Cross sectional shape | It is round | It is round | Double shelled peanut shapes |
Table 4
| Project | Unit | Comparative example 1 | Comparative example 2 |
| POY kind | - | 300dtex-48F | 300dtex-48F |
| PBT inherent viscosity | dl/g | 1.31 | 1.31 |
| PET inherent viscosity | dl/g | 0.68 | 0.51 |
| Inherent viscosity is poor | dl/g | 0.63 | 0.80 |
| PBT/PET mass ratio | - | 50/50 | 50/50 |
| PBT spinning temperature | ℃ | 265 | 265 |
| PET spinning temperature | ℃ | 285 | 285 |
| Spinning speed | m/min | 2500 | 2500 |
| DTY kind | - | 167dtex-48F | 167dtex-48F |
| Filament number | dtex | 3.48 | 3.48 |
| DTY multiplying power | - | 1.85 | 1.85 |
| False twisting mode | - | Navel | Navel |
| Heater temperature | ℃ | 190 | 190 |
| Process velocity | m/min | 500 | 500 |
| DTY intensity | cN/dtex | 3.23 | 3.35 |
| DTY elongation | % | 23.4 | 24.1 |
| DTY elastic extension | % | 10.0 | 70.0 |
| DTY elastic recovery rate | % | 98.0 | 85.0 |
| Cross sectional shape | It is round | It is round |
Embodiment 12
Fusion method prepares parallel composite fiber, it chooses the polybutylene terephthalate (PBT) (PBT) that inherent viscosity is 1.10dl/g and the cation dyeable copolyester that inherent viscosity is 0.50dl/g, S constituent content 0.40wt% carries out composite spinning, the dl/g that their inherent viscosity differences are 0.60.Be separately dried make its moisture be less than 80ppm, by after drying polybutylene terephthalate (PBT) and cation dyeable copolyester A, B screw rod are put into respectively with the weight ratio of 50:50 and squeezed out.A extruder temperature is 260 DEG C, and B extruder temperature is 270 DEG C, and spinning body temperature is 275 DEG C.It is spun using parallel type spinneret.Coiling speed is set as 2500m/min, obtains the preoriented yarn that kind is 150T-24f.
The preoriented yarn spooled is subjected to false twisting processing, the hot needle temperature of false twisting is 90 DEG C, and heater temperature is 150 DEG C, and extension ratio is 1.60 times at hot needle, and extension ratio is 1.0 times at hot tank, and overall elongation multiplying power is 1.60 times.Process velocity is 500m/min.Final DTY kind is 84T-24f.
Obtained DTY physical property is measured, specific value is shown in Table 5.
Embodiment 13
The polybutylene terephthalate (PBT) that inherent viscosity is 1.25dl/g is chosen, inherent viscosity is the cation dyeable copolyester of 0.65dl/g, other carry out composite spinning with embodiment 12.Specific value is shown in Table 5.
Embodiment 14
The polybutylene terephthalate (PBT) that inherent viscosity is 1.20dl/g is chosen, inherent viscosity is the cation dyeable copolyester of 0.60dl/g, other carry out composite spinning with embodiment 12.Specific value is shown in Table 5.
Comparative example 3
The polybutylene terephthalate (PBT) that inherent viscosity is 1.00dl/g is chosen, inherent viscosity is the cation dyeable copolyester of 0.40dl/g, other carry out composite spinning with embodiment 12.Specific value is shown in Table 5.
Comparative example 4
The polybutylene terephthalate (PBT) that inherent viscosity is 1.30dl/g is chosen, inherent viscosity is the cation dyeable copolyester of 0.70dl/g, other carry out composite spinning with embodiment 12.Specific value is shown in Table 5.
Table 5
Embodiment 15
Fusion method prepares parallel composite fiber, the polybutylene terephthalate (PBT) and inherent viscosity that selection inherent viscosity is 1.05dl/g are that the cation dyeable copolyester that 0.60dl/g, S constituent content are 0.40wt% carries out composite spinning, the dl/g that their inherent viscosity differences are 0.45.Be separately dried make its moisture be less than 80ppm, by after drying polybutylene terephthalate (PBT) and cation dyeable copolyester A, B screw rod are put into respectively with the weight ratio of 50:50 and squeezed out.A extruder temperature is 260 DEG C, and B extruder temperature is 275 DEG C, and spinning body temperature is 280 DEG C.It is spun using parallel type spinneret.Coiling speed is set as 2500m/min, obtains the preoriented yarn that kind is 150T-24f.
The preoriented yarn spooled is subjected to false twisting processing, the hot needle temperature of false twisting is 90 DEG C, and heater temperature is 150 DEG C, and extension ratio is 1.60 times at hot needle, and extension ratio is 1.0 times at hot tank, and overall elongation multiplying power is 1.60 times.Process velocity is 500m/min.Final DTY kind is 84T-24f.
Obtained DTY physical property is measured, specific value is shown in Table 6.
Embodiment 16
The polybutylene terephthalate (PBT) that inherent viscosity is 1.30dl/g is chosen, inherent viscosity is the cation dyeable copolyester of 0.50dl/g, and A extruder temperature is 280 DEG C, and B screw rod is 270 DEG C, and spinning body temperature is 280 DEG C.Other carry out composite spinning with embodiment 15.Specific value is shown in Table 6.
Embodiment 17
The polybutylene terephthalate (PBT) that inherent viscosity is 1.55dl/g is chosen, inherent viscosity is the cation dyeable copolyester of 0.45dl/g, and A extruder temperature is 285 DEG C, and B screw rod is 270 DEG C, and spinning body temperature is 285 DEG C.Other carry out composite spinning with embodiment 15.Specific value is shown in Table 6.
Comparative example 5
The polybutylene terephthalate (PBT) that inherent viscosity is 0.90dl/g is chosen, inherent viscosity is the cation dyeable copolyester of 0.50dl/g, and A extruder temperature is 260 DEG C, and B screw rod is 270 DEG C, and spinning body temperature is 270 DEG C.Other carry out composite spinning with embodiment 15.Specific value is shown in Table 6.
Table 6
Embodiment 18
The combined weight of polybutylene terephthalate (PBT) and cation dyeable copolyester ratio is 70:30, other carry out composite spinning with embodiment 12.Specific value is shown in Table 7.
Embodiment 19
The combined weight of polybutylene terephthalate (PBT) and cation dyeable copolyester ratio is 30:70, other are carried out with embodiment 12
Composite spinning.Specific value is shown in Table 7.
Comparative example 6
The combined weight of polybutylene terephthalate (PBT) and cation dyeable copolyester ratio is 80:20, other carry out composite spinning with embodiment 12.Specific value is shown in Table 7.
Comparative example 7
The combined weight of polybutylene terephthalate (PBT) and cation dyeable copolyester ratio is 20:80, other carry out composite spinning with embodiment 12.Specific value is shown in Table 7.
Table 7
Embodiment 20
Fusion method prepares parallel composite fiber, the polybutylene terephthalate (PBT) and inherent viscosity that selection inherent viscosity is 1.10dl/g are that the cation dyeable copolyester that 0.50dl/g, S constituent content are 0.20wt% carries out composite spinning, the dl/g that their inherent viscosity differences are 0.60.Be separately dried make its moisture be less than 80ppm, by after drying polybutylene terephthalate (PBT) and cation dyeable copolyester A, B screw rod are put into respectively with the weight ratio of 50:50 and squeezed out.A extruder temperature is 260 DEG C, and B extruder temperature is 270 DEG C, and spinning body temperature is 275 DEG C.It is spun using parallel type spinneret.Coiling speed is set as 2500m/min, obtaining kind is the pre- of 150T-24f
It is orientated silk.Specific value is shown in Table 8.
Embodiment 21
Selecting S constituent content is the cation dyeable copolyester of 0.90wt%, other carry out composite spinning with embodiment 20.Specific value is shown in Table 8.
Table 8
Embodiment 22
Fusion method prepares bicomponent elastic fiber, chooses the polybutylene terephthalate (PBT) that inherent viscosity is 1.8dl/g and the polyethylene terephthalate that inherent viscosity is 0.51dl/g carries out composite spinning, their inherent viscosity difference is 1.29dl/g.Be separately dried, its moisture made to be less than 100ppm, by after drying polybutylene terephthalate (PBT) and polyethylene terephthalate No. 1/No. 2 manifolds are put into respectively with 50: 50 weight ratio.Setting spinning temperature, No. 1 265 DEG C of extruder screw temperature；No. 2 285 DEG C of spinning machine extruder temperature；Spinning body temperature is 285 DEG C.It is spun using parallel type spinneret, sets winding speed as 2500m/min, control precursor kind 300dtex/48F.
Navel false twisting processing is carried out to the preoriented yarn of winding, 190 DEG C of heater temperature, false twisting multiplying power sets 1.80, extension speed 500m/min.Final DTY kind 167dtex/48F, filament number 3.48dtex.
DTY silk intensity, elongation, elastic extension, elastic recovery rate after measuring false twisting.Specific value is shown in Table 9.
Embodiment 23
Fusion method prepares bicomponent elastic fiber, chooses the polybutylene terephthalate (PBT) that inherent viscosity is 2.0dl/g and the polyethylene terephthalate that inherent viscosity is 0.51dl/g carries out composite spinning, such as embodiment 22, specific value is shown in Table 9 for other.
Comparative example 8
Melt method preparation bicomponent elastic fiber, chooses the polybutylene terephthalate (PBT) that inherent viscosity is 1.31dl/g and the polyethylene terephthalate that inherent viscosity is 0.51dl/g carries out composite spinning, their inherent viscosity difference is 0.80dl/g.Be separately dried, its moisture made to be less than 100ppm, by after drying polybutylene terephthalate (PBT) and polyethylene terephthalate No. 1/No. 2 manifolds are put into respectively with 50: 50 weight ratio.Setting spinning temperature, No. 1 265 DEG C of extruder screw temperature；No. 2 285 DEG C of spinning machine extruder temperature；Spinning body temperature is 270 DEG C.It is spun using parallel type spinneret, sets winding speed as 2500m/min, control precursor kind 300dtex/48F.
Navel false twisting processing is carried out to the preoriented yarn of winding, the hot needle temperature after silk roller is fed on false twisting machine sets 80 DEG C, 190 DEG C of heater temperature, extension ratio setting 1.85 at hot needle, extension ratio setting 1.0 at hot tank, overall elongation multiplying power are 1.85, extension speed 500m/min.Final DTY kind 167dtex/48F, filament number 3.48dtex.
DTY silk intensity, elongation, elastic extension, elastic recovery rate after measuring false twisting.Specific value is shown in Table 9.
Table 9
| Project | Unit | Embodiment 22 | Embodiment 23 | Comparative example 8 |
| POY kind | - | 300dtex-48F | 300dtex-48F | 300dtex-48F |
| PBT inherent viscosity | dl/g | 1.80 | 2.00 | 1.31 |
| PET inherent viscosity | dl/g | 0.51 | 0.51 | 0.51 |
| Inherent viscosity is poor | dl/g | 1.29 | 1.49 | 0.80 |
| PBT/PET mass ratio | - | 50/50 | 50/50 | 50/50 |
| PBT spinning temperature | ℃ | 265 | 265 | 265 |
| PET spinning temperature | ℃ | 285 | 285 | 285 |
| Spinning speed | m/min | 2500 | 2500 | 2500 |
| DTY kind | - | 167dtex-48F | 167dtex-48F | 167dtex-48F |
| Filament number | dtex | 3.48 | 3.48 | 3.48 |
| DTY multiplying power (hot needle/hot tank) | - | 1.85 | 1.85 | 1.85/1.0 |
| False twisting mode | - | Navel | Navel | Outer drawing-off |
| Hot needle/heater temperature | ℃ | Without/190 | Without/190 | 80/190 |
| Process velocity | m/min | 500 | 500 | 500 |
| DTY intensity | cN/dtex | 3.45 | 3.60 | 3.30 |
| DTY elongation | % | 21.0 | 20.4 | 22.6 |
| DTY elastic extension | % | 120 | 129 | 187.5 |
| DTY elastic recovery rate | % | 90.0 | 93.0 | 90.2 |
| Cross sectional shape | - | It is round | It is round | It is round |
Claims (8)
- A kind of parallel composite fiber, it is characterised in that: the polyester that the polybutylene terephthalate (PBT) and inherent viscosity that the fiber is 1.00~2.00dl/g by inherent viscosity are 0.45~0.65dl/g is made after carrying out composite spinning arranged side by side with 70: 30~30: 70 weight ratio through false twisting processing；Wherein, the inherent viscosity difference of polybutylene terephthalate (PBT) and polyester is 0.35~1.55dl/g, and the elastic extension of the fiber is 20~129%, and elastic recovery rate is 65% or more.
- Parallel composite fiber according to claim 1, it is characterised in that: the polyester is polyethylene terephthalate, and the inherent viscosity of the polybutylene terephthalate (PBT) is 1.00~1.80dl/g.
- Parallel composite fiber according to claim 2, it is characterised in that: the filament number of the fiber is 0.45~7.00dtex.
- Parallel composite fiber according to claim 1, it is characterised in that: the polyester is cation dyeable copolyester, and the inherent viscosity of the polybutylene terephthalate (PBT) is 1.00~1.50dl/g.
- Parallel composite fiber according to claim 4, it is characterized by: the structural unit accounts for 0.20~1.00wt% of cation dyeable copolyester in terms of element sulphur containing the structural unit formed by the M-phthalic acid or derivatives thereof with sodium group in the cation dyeable copolyester.
- Parallel composite fiber according to claim 5, it is characterised in that: described M-phthalic acid with sodium group or derivatives thereof is 5-sodium sulfo isophthalate, Sodium Dimethyl Isophthalate-5-sulfonate or ethylene isophthalate -5- sodium sulfonate.
- Parallel composite fiber according to claim 4, it is characterised in that: the fiber is after cation stain, and color emissivity L value is below 16.0.
- Described in any item parallel composite fibers according to claim 1~7, it is characterised in that: the inherent viscosity difference of the polybutylene terephthalate (PBT) and polyester is 0.4~1.05dl/g.
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| CN2016103407790 | 2016-05-23 | ||
| CN201610340779.0A CN107419363A (en) | 2016-05-23 | 2016-05-23 | A kind of parallel composite fiber |
| CN201610773951.1A CN107779987A (en) | 2016-08-31 | 2016-08-31 | A kind of parallel composite elastic fiber and its manufacture method |
| CN2016107739511 | 2016-08-31 | ||
| PCT/CN2017/085260 WO2017202262A1 (en) | 2016-05-23 | 2017-05-22 | Parallel composite fibre |
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| CN114008255A (en) * | 2019-06-04 | 2022-02-01 | 韩国商东丽先端素材股份有限公司 | Polyester composite fiber with good elasticity and preparation method thereof |
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| TWI760130B (en) * | 2021-03-05 | 2022-04-01 | 新光合成纖維股份有限公司 | High color fastness bicomponent composite fiber, yarn and fabric made from the same |
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| JP7043424B2 (en) | 2022-03-29 |
| WO2017202262A1 (en) | 2017-11-30 |
| JP2019516878A (en) | 2019-06-20 |
| CN108138379B (en) | 2021-01-01 |
| TW201835401A (en) | 2018-10-01 |
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