CN103122495B - A kind of modified copolymer ester fiber and preparation method thereof and fabric - Google Patents
A kind of modified copolymer ester fiber and preparation method thereof and fabric Download PDFInfo
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Abstract
The invention discloses a kind of normal pressure and disperse dyeable modified copolyester fiber, formed by modified copolyester spinning, described copolyesters is be the aliphatic dihydroxy alcohol of less than 6 with side chain and carbon number containing Third monomer, and its content accounts for the 5～25mol% constituting copolyesters dihydroxylic alcohols total amount；Described copolyester fiber is degree of crystallinity is 20～50%, along the axial interplanar distance of fiber from forAnd crystalline orientation Δ naIt is 10～100 × 10-3Fully drawn yarn, the dye-uptake of this fiber is fast, even dyeing, can keep good physical property；Can be applicable to dress material and industrial applications。
Description
Technical field
The present invention relates to a kind of normal pressure and disperse dyeable modified copolyester fiber and preparation method thereof and fabric。
Background technology
The usually said polyester fiber of people refers to polyethylene terephthalate (PET) fiber, namely by the polyester slice of p-phthalic acid and ethylene glycol polycondensation through melt spinning, the fiber finally obtained；It is a kind of more satisfactory textile raw material。But this polyester fiber itself has the defects such as dyeing temperature height, dyeing speed be slow, have impact on its application in dress material purposes。Normal pressure dispersion is weaved after can contaminating the blending resultant yarns such as fiber and conventional polyester fiber, Pilus Caprae seu Ovis, Cotton Gossypii, or interweaves with polyester-cotton blend, Quality Pure Cotton Yarn Production, it is possible to obtain the fabric of individual style。
Polyester fiber as crystalline high polymer fiber, the shortcomings such as its degree of crystallinity is higher, and dye-uptake is relatively low, and dyeing temperature is higher。In order to obtain having low temperature dispersion stainability can polyester fiber, be generally adopted special spinning and drawing process, such as ultraspeed spinning, the fiber of the special tectonics such as low orientated amorphous can be obtained, this fiber has low temperature dispersion stainability energy, and dye-uptake is fast。But the spinning speed of super high-speed spinning generally to reach more than 10000m/min, obtained fiber just has the characteristics such as certain low temperature dispersion can contaminate, this super high-speed spinning technology is very high to the requirement of equipment, is typically now served only for research, is also difficult to mass production and produces。
The technology of the present invention is the method adopting chemical modification, as with 2-methyl isophthalic acid, 4-butanediol is the modified copolymer ester fiber that Third monomer is produced, this modified copolymer ester fiber is stretched in spinning process, forming the fiber of special tectonic with relatively low crystalline orientation etc., therefore it has normal pressure dispersion and can contaminate and dye-uptake advantage soon etc.。
Summary of the invention
It is an object of the invention to provide the low temperature that has of a kind of dress material and industrial applications and disperse modified copolymer ester fiber that can contaminate characteristic and preparation method thereof。
The present invention also aims to provide a kind of fabric with low temperature dispersion stainability energy；This fabric can economize the energy when dyeing, reduces cost, can also carry out co-bathing dyeing with other natural fabrics simultaneously, and obtain good dyeability。
The technical solution of the present invention is:
A kind of modified copolymer ester fiber, is formed by modified copolyester spinning, is be the aliphatic dihydroxy alcohol of less than 6 with side chain and carbon number containing Third monomer, and its content accounts for the 5～25mol% constituting copolyesters dihydroxylic alcohols total amount in described copolyesters；Described copolyester fiber is degree of crystallinity is 20～50%, along the axial interplanar distance of fiber from forAnd crystalline orientation Δ naIt is 10～100 × 10-3Fully drawn yarn。The above-mentioned crystal face axial along fiber is (-110) diffraction crystal face。
Described Third monomer is 2-methyl isophthalic acid with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6,3 propylene glycol, 2,2-dimethyl-1,3 propylene glycol, 2-methyl isophthalic acid, 4-butanediol, 2,3-dimethyl-BDO or 2-methyl isophthalic acid, 5-pentanediol, it is preferable that 2-methyl isophthalic acid, 3 propylene glycol。
In copolyesters, Third monomer accounts for the 5～25mol% constituting copolyesters dihydroxylic alcohols total amount with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6。When its content is lower than 5mol%, copolyester fiber does not reach the effect of low temperature dyeing；When its content is higher than 25mol%, easily causes and produce specking and the low inferior adverse consequences of colorfastness because dye-uptake is too fast。
In described polyester fiber, the content of cobalt element is 50ppm～120ppm。Cobalt element in polyester fiber plays the effect regulating fiber tone so that the fiber produced is whiter；Its cobalt element adds the jaundice of very few fiber, and cobalt element added multifilament blackout, caused in fiber post-treatment process not easily light dye。
Prepare described modified copolymer ester fiber and can adopt preorientation-extension two-step method or high speed spinning processes。Preorientation-extension two-step method comprises the steps:
(1) modified copolyester being carried out melt spinning, spinning speed is 2000～4000m/min, and prepared degree of crystallinity is 0～30%, and fibre orientation Δ n is 5～50 × 10-3Preorientation do not extend silk；
(2) preorientation obtained not being extended silk and carry out the drawing-off of 1.5～1.9 times, during drawing-off, the temperature of 1 hot-rolling (1HR) is 60～100 DEG C, and the temperature of 2 hot-rollings (2HR) is 140～190 DEG C, finally gives fully drawn yarn。
High speed spinning processes is mainly and Modified polyester chips is carried out melt spinning, and spinning temperature is 240～290 DEG C, and spinning speed is 5000～9000m/min, and last directly one-step shaping obtains required fully drawn yarn。
The modified copolymer ester fiber prepared by any of the above-described kind of method is respectively provided with the characteristic that low temperature disperses to contaminate, and dye-uptake is fast, even dyeing, can keep good fibrous physical property；Preparation technology is simple to operation simultaneously。
A kind of fabric being made up of above-mentioned modified polyester fiber, has the characteristics such as normal pressure dispersion can contaminate and dye-uptake is fast。Concrete dyeing condition is as follows: after being deoiled by the fabric scouring put in order, is put in staining machine and carries out low temperature dyeing with the temperature of 90～100 DEG C, and dyeing time is 20min～120min。Fabric after the dyeing obtained is carried out dyeability judgement, and black L-value is less than 22。
Method of testing:
(1) crystalline orientation degree fc
The crystalline orientation degree f of yarncEvaluation methodology be X ray polycrystalline diffractometer (D/max2550PC, Rigaku) test and obtain。Concrete grammar is as follows: first takes mass of fibers and is arranged boundling, size after boundling is about 20mm (1) × 2mm (w) × 1mm (d), then being scanned test with X ray polycrystalline diffractometer, data scanning obtained are calculated finally giving the crystalline orientation degree of yarn with special analysis software (JADE) by certain program。
Computing Principle formula is: fc=(360-∑ Hi)/360 × 100%
Hi: by scanning the half-peak breadth obtained, °。
(2) degree of crystallinity and interplanar distance from
Heretofore described degree of crystallinity and interplanar distance from method of testing be obtained by X ray polycrystalline diffractometer (D/max2550PC, Rigaku) test。Concrete method of testing is as follows: first take a small amount of fiber, shredded powdered after be put into X ray polycrystalline diffractometer be scanned test, instrument exports scanning data automatically, then swarming matching is carried out with special analysis software (JADE), the data that matching is good are calculated by last instrument according to certain procedures, obtain degree of crystallinity and interplanar distance from etc. data。
The Computing Principle formula of degree of crystallinity: Xc=∫ Ic/(∫Ia+∫Ic) × 100%
Xc: degree of crystallinity, %；
Ic: the diffracted intensity of the peak crystallization after swarming matching, cps；
Ia: the diffracted intensity at the amorphous peak after swarming matching, cps。
(3) crystalline orientation Δ na
Heretofore described crystalline orientation Δ naEvaluation methodology be: first the orientation Δ n of test yarn, crystallinity Xc, crystalline orientation degree fc, then pass through formula and calculate and obtain。
Computing formula is: Δ na=(Δ n-fc×Δnc 0)/(1-Xc)
Δna: the crystalline orientation of yarn；
Δnc: the crystalline orientation of yarn；
Δ n: the orientation of yarn；
fc: the crystalline orientation degree of yarn。
Wherein, orientation Δ n evaluation methodology is to use polarizing microscope (NikonECLIPSEE600POL) to observe fiber to calculate again through formula。Concrete method of testing is as follows: using blade to cut the fiber samples of 2～3cm, fiber cross-sectional is oblique 45 °。Monofilament in polarized light microscopy Microscopic observation fiber, adjusts fibre single thread position in the visual field, reads the diameter D (μ) of fiber。Regulate microscope so that sample is changed by light angle in the visual field and occurs color to change, when the sample in the visual field presents black, read the θ angle reading of display on microscope。Observe the form in the oblique 45 ° of faces of sample simultaneously, have during blackstreak and record island number (having a blackstreak Suan Yige island, it does not have be then designated as 0),
Computing formula is: orientation Δ n=((180n+ θ) × 546.5/180)/D
N: island number；
θ: analyze angle；
D: fiber filament diameter (μ)；
546.5: polarizing microscope optical source wavelength (nm)。
(4) black L-value
Heretofore described black L-value evaluation methodology is to test with spectrophotometer (datacolor650TM)。Concrete method of testing is as follows: the fabric after dyeing is built up 2～8 layers (unclarity degree), then tests on spectrophotometer (datacolor650TM), and the aperture selected during test isGeneral black L-value is less than 22 be judged as that Color is good。
Detailed description of the invention
Embodiment 1
With polyethylene terephthalate for matrix polymer, Third monomer is 2-methyl isophthalic acid with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6,3 propylene glycol, and this glycol monomer accounts for the 10mol% constituting copolyesters dihydroxylic alcohols total amount。
This copolyesters being made spinning chips and carries out preorientation-extension two-step method melt spinning, spinning temperature is 265 DEG C, and spinning speed is 3000m/min, and the low orientated degree of crystallinity not extending silk obtained is 6.5%, and orientation Δ n is 30.2 × 10-3；Then this low orientated silk that do not extend being carried out 1.71 times of drawing-offs extensions, during extension, 1 hot-rolling (1HR) is 90 DEG C, and 2 hot-rollings (2HR) are 160 DEG C, the fully drawn yarn finally given。The degree of crystallinity of gained modified copolymer ester fiber is 36.7%, and crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 91 × 10-3, wherein cobalt element content is 95ppm。
The prepared full copolyester fiber that stretches being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 21.6。
Embodiment 2
With polyethylene terephthalate for matrix polymer, Third monomer is 2-methyl isophthalic acid with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6,3 propylene glycol, and this glycol monomer accounts for the 15mol% constituting copolyesters dihydroxylic alcohols total amount。
This copolyesters being made spinning chips and carries out preorientation-extension two-step method melt spinning, spinning temperature is 265 DEG C, and spinning speed is 3000m/min, and the low orientated degree of crystallinity not extending silk obtained is 4.2%, and orientation Δ n is 27.8 × 10-3；Then this low orientated silk that do not extend being carried out 1.71 times of drawing-offs extensions, during extension, 1 hot-rolling (1HR) is 90 DEG C, and 2 hot-rollings (2HR) are 160 DEG C, the fully drawn yarn finally given。The degree of crystallinity of gained modified copolymer ester fiber is 48.6%, and crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 35 × 10-3, wherein cobalt element content is 65ppm。
The full copolyester fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 19.5。
Embodiment 3
With polyethylene terephthalate for matrix polymer, Third monomer is 2-methyl isophthalic acid with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6,4-butanediol, and this glycol monomer accounts for the 20mol% constituting copolyesters dihydroxylic alcohols total amount。
This copolyesters being made spinning chips and carries out preorientation-extension two-step method melt spinning, spinning temperature is 265 DEG C, and spinning speed is 3000m/min, and the low orientated degree of crystallinity not extending silk obtained is 3.8%, and orientation Δ n is 26.1 × 10-3；Then this low orientated silk that do not extend being carried out 1.75 times of drawing-offs extensions, during extension, 1 hot-rolling (1HR) is 90 DEG C, and 2 hot-rollings (2HR) are 160 DEG C, the fully drawn yarn finally given。The degree of crystallinity of gained modified copolymer ester fiber is 43.5%, and crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 13 × 10-3, wherein cobalt element content is 95ppm。
The full copolyester fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 16.3。
Embodiment 4
With polyethylene terephthalate for matrix polymer, Third monomer is 2-methyl isophthalic acid with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6,3 propylene glycol, and this glycol monomer accounts for the 15mol% constituting copolyesters dihydroxylic alcohols total amount。
This copolyesters being made spinning chips and carries out high speed method one step melt spinning, spinning temperature is 265 DEG C, and spinning speed is 6000m/min, obtains fully drawn yarn。The degree of crystallinity of gained modified copolymer ester fiber is 24.8%, and orientation Δ n is 70.4 × 10-3, crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 11 × 10-3, wherein cobalt element content is 110ppm。
The full copolyester fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 16.1。
Embodiment 5
With polyethylene terephthalate for matrix polymer, Third monomer is 2,2-dimethyl-1 with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6,3 propylene glycol, and this glycol monomer accounts for the 10mol% constituting copolyesters dihydroxylic alcohols total amount。
This copolyesters being made spinning chips and carries out high speed method one step melt spinning, spinning temperature is 265 DEG C, and spinning speed is 6000m/min, obtains fully drawn yarn。The degree of crystallinity of gained modified copolymer ester fiber is 32.4%, and orientation Δ n is 73.7 × 10-3, crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 12 × 10-3, wherein cobalt element content is 85ppm。
The full copolyester fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 16.9。
Comparative example 1
Pure polyethylene terephthalate being made spinning chips and carries out preorientation-extension two-step method melt spinning, spinning temperature is 290 DEG C, and spinning speed is 3000m/min, and the low orientated degree of crystallinity not extending silk obtained is 2.7%, and orientation Δ n is 36.6 × 10-3；Then the low orientated silk that do not extend being carried out 1.74 times and leads extension, during extension, 1 hot-rolling (1HR) is 90 DEG C, and 2 hot-rollings (2HR) are 160 DEG C, the fully drawn yarn finally given。The degree of crystallinity of gained polyester fiber is 33.8%, and crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 120 × 10-3。
The full fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 45.1。
Fully drawn yarn woven into fabric derived above, because the crystalline orientation of its fiber is higher, along the axial interplanar distance of fiber from finer and close, when using disperse dyes dyeing owing to dye molecule is difficult to enter in fiber molecule chain, causing that fabric is extremely difficult to the effect of low temperature dyeing, the dyeing speed of fabric is slower simultaneously。
Comparative example 2
Pure polyethylene terephthalate being made spinning chips and carries out preorientation-extension two-step method melt spinning, spinning temperature is 290 DEG C, and spinning speed is 4000m/min, and the low orientated degree of crystallinity not extending silk obtained is 3.7%, and orientation Δ n is 67.2 × 10-3；Then being carried out 1.31 times and lead extension by the obtained low orientated silk that do not extend, during extension, 1 hot-rolling (1HR) is 90 DEG C, and 2 hot-rollings (2HR) are 160 DEG C, the fully drawn yarn finally given。Its degree of crystallinity of gained polyester fiber is 35.0%, and crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 120.3 × 10-3。
The full fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 42.6。
By fully drawn yarn woven into fabric derived above, because the crystalline orientation of its fiber is higher, when using disperse dyes dyeing owing to dye molecule is difficult to enter in fiber molecule chain, causing that fabric is extremely difficult to the effect of low temperature dyeing, the dyeing speed of fabric is slower simultaneously。
Comparative example 3
Pure polyethylene terephthalate being made spinning chips and carries out high speed method one step melt spinning, spinning temperature is 290 DEG C, and spinning speed is 6000m/min, obtains fully drawn yarn。The degree of crystallinity of gained polyester fiber is 51.3%, and orientation Δ n is 113.8 × 10-3, crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 13.3 × 10-3。
The full fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 33.5。
Fully drawn yarn woven into fabric derived above, because the degree of crystallinity of fiber is higher, it may appear that be difficult to dense dye, and the shortcoming such as the dyeing rate of fabric is slower。
Comparative example 4
With polyethylene terephthalate for matrix polymer, Third monomer is 2-methyl isophthalic acid with side chain and aliphatic dihydroxy alcohol that carbon number is less than 6,3 propylene glycol, and this glycol monomer accounts for the 35mol% constituting copolyesters dihydroxylic alcohols total amount。
This copolyesters being made spinning chips and carries out high speed method one step melt spinning, spinning temperature is 265 DEG C, and spinning speed is 6000m/min, obtains fully drawn yarn。The degree of crystallinity of gained polyester fiber is 18.5%, and orientation Δ n is 61.1 × 10-3, crystal face (-110) spacing axial along fiber is Crystalline orientation is Δ naIt is 26.5 × 10-3。
The full fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 18.3。
By fully drawn yarn woven into fabric derived above, because the degree of crystallinity of fiber is relatively low, the interplanar distance degree axial along fiber is relatively big, and fiber easily occurs that upper dye is very fast, dye uneven consequence；There will be the problems such as the intensity of fiber is relatively low, Young's modulus is relatively low, fiber is more yellow simultaneously, make fiber post-treatment process is difficult to light dye。
Comparative example 5
By eastern beautiful 420M (with polyethylene terephthalate for matrix polymer, Third monomer PEG1000, and Third monomer accounts for the 9wt% of polymer) polyester slice carries out preorientation-extension two-step method melt spinning, spinning temperature is 285 DEG C, spinning speed is 3000m/min, the low orientated degree of crystallinity not extending silk obtained is 4.2%, and orientation Δ n is 22.3 × 10-3；Then being carried out 1.94 times and lead extension by the obtained low orientated silk that do not extend, during extension, 1 hot-rolling (1HR) is 90 DEG C, and 2 hot-rollings (2HR) are 160 DEG C, the fully drawn yarn finally given。The degree of crystallinity of gained polyester fiber is 56.2%, and crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 6.0 × 10-3。
The full fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 22.1。
Due to the existence of PEG1000 in polymer, although the low temperature dyeing performance of polyester fiber can be improved to a certain extent, but when carrying out two-step method spinning with the spinning speed of 3000m/min, in preorientation Primary Processing, easily occur delaying shrinkage phenomenon, making hammer roll out existing ectonexine difference, carrying out when entirely stretching of next step drawing-off, the yarn configuration obtained is uneven；The crystalline orientation of fully drawn yarn is relatively low simultaneously, dye-uptake is fast, degree of crystallinity is fast, is finally easily caused fabric and easily occurs the problems such as specking when dyeing。
Comparative example 6
Eastern beautiful 420M polyester slice is carried out high speed method one step melt spinning, and spinning temperature is 265 DEG C, and spinning speed is 6000m/min, the fully drawn yarn of gained, and its degree of crystallinity is 27.3%, and orientation Δ n is 59.6 × 10-3, crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 2.2 × 10-3。
The full fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 23.9。
By fully drawn yarn woven into fabric derived above, the crystalline orientation of fiber is low, and the intensity of its fiber is low, it is more difficult to carry out high speed spinning；Simultaneously because dye-uptake is too fast, degree of crystallinity is big, there is also the problems such as specking。
Comparative example 7
Eastern beautiful 420M polyester slice is carried out preorientation-extension two-step method melt spinning, and spinning temperature is 285 DEG C, and spinning speed is 4000m/min, and the low orientated degree of crystallinity not extending silk obtained is 6.3%, and orientation Δ n is 38.4 × 10-3；Then being carried out 1.69 times and lead extension by the obtained low orientated silk that do not extend, during extension, 1 hot-rolling (1HR) is 90 DEG C, and 2 hot-rollings (2HR) are 160 DEG C, the fully drawn yarn finally given。The degree of crystallinity of gained polyester fiber is 52.3%, and crystal face (-110) spacing axial along fiber isCrystalline orientation is Δ naIt is 20.8 × 10-3。
The full fiber that stretches obtained above being made into cylinder volume thing, carries out the concise poststaining that deoils, dyeing condition is as follows: dyestuff is DianBlackETD300% (black), and dyestuff confrontation weight 3%owf, dyeing temperature is 95 DEG C × 60min, and bath raio is 1: 20。The black L-value finally recording fabric is 22.5。
Due to the existence of PEG1000 in polymer, although the low temperature dyeing performance of polyester fiber can be improved to a certain extent, but when carrying out two-step method spinning with the spinning speed of 4000m/min, in its preorientation Primary Processing, easily occur delaying shrinkage phenomenon, making hammer roll out existing ectonexine difference, carrying out when entirely stretching of next step drawing-off, the yarn configuration obtained is uneven；There is fully drawn yarn degree of crystallinity relatively big, dense dye is difficult to and the problem such as specking to cause fabric easily to occur when dyeing simultaneously。
Claims (4)
1. a modified copolymer ester fiber, is formed by modified copolyester spinning, it is characterized in that: be the aliphatic dihydroxy alcohol of less than 6 with side chain and carbon number containing Third monomer in described copolyesters, and its content accounts for the 5～25mol% constituting copolyesters dihydroxylic alcohols total amount；Described copolyester fiber is degree of crystallinity is 20～50%, along the axial interplanar distance of fiber from for 3.93～3.99?, and crystalline orientation Δ naIt is 10～100 × 10-3Fully drawn yarn；In described polyester fiber, the content of cobalt element is 50ppm～120ppm。
2. a preparation method for modified copolymer ester fiber described in claim 1, is characterized in that: comprise the steps:
(1) modified copolyester being carried out melt spinning, spinning speed is 2000～4000m/min, and prepared degree of crystallinity is 0～30%, and fibre orientation Δ n is 5～50 × 10-3Preorientation do not extend silk；
(2) preorientation obtained not being extended silk and carry out the drawing-off of 1.5～1.9 times, during drawing-off, the temperature of 1 hot-rolling is 60～100 DEG C, and the temperature of 2 hot-rollings is 140～190 DEG C, finally gives fully drawn yarn。
3. a preparation method for modified copolymer ester fiber described in claim 1, is characterized in that: Modified polyester chips is carried out melt spinning, spinning speed is 5000～9000m/min, obtains fully drawn yarn。
4. a fabric, is characterized in that: described in claim 1, modified copolyester fiber weaving forms, and described fabric has normal pressure dispersion stainability, and dyeing temperature is 90～100 DEG C。
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| CN106835437B (en) * | 2016-12-15 | 2019-08-20 | 中国纺织科学研究院有限公司 | A kind of aromatic polyester-aliphatic polyester block copolymerization ester fiber and protein fibre fabric |
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