CN101906678B - Modified polyester complex fiber and preparation method thereof - Google Patents
Modified polyester complex fiber and preparation method thereof Download PDFInfo
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- CN101906678B CN101906678B CN2010102574394A CN201010257439A CN101906678B CN 101906678 B CN101906678 B CN 101906678B CN 2010102574394 A CN2010102574394 A CN 2010102574394A CN 201010257439 A CN201010257439 A CN 201010257439A CN 101906678 B CN101906678 B CN 101906678B
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Abstract
The invention provides a modified polyester complex fiber. The complex fiber is prepared by compounding modified polyester and thermoplastic resin, wherein the modified polyester accounts for 10 to 90 percent of the total weight of the complex fiber, and the thermoplastic resin accounts for 10 to 90 percent of the total weight of the complex fiber; and the modified polyester structure comprises structural units shown in the specifications, wherein m1 is more than 1 and less than 160, m2 is more than 1 and less than 70, m3 is more than or equal to 0 and less than 20, and m4 is more than or equal to 0 and less than 20. The complex fiber can be dyed at normal temperature and normal pressure by using acid dye and disperse dye, and has the advantages of high color fastness, high elasticity and comfortable handfeel.
Description
Technical field
The present invention relates to a kind of polyester complex fiber, particularly, relate to a kind of modified polyester complex fiber and preparation method thereof.
Background technology
Polyester fiber is because it has excellent machinery, physics, chemical property, thereby is widely used in every field.Along with the development of polyester industrial, make our life become rich and varied, the exploitation of many new polyester modification kinds; Enriched the diversity in lining market greatly; In recent years, along with China's economic development is accelerated gradually, with integrating with of world trends; Make the polyester industrial of China that rapid progress arranged, chemical fibre market is immediately following world trends.
Every kind of fiber all has its pluses and minuses, and in the life, what people pursued is not only weave machine performance etc., also needs diversified pattern, increases its aesthetic feeling.But for conventional polyester, because its structure be difficult to realize dyeing at normal pressure, and high-temperature pressure dyeing can't be produced continuously in industry.For example one Chinese patent application CN200810242976.4 discloses a kind of novel dual-color side-by-side composite polyester fiber; It is the novel dual-color side-by-side type composite fibre of a kind of common half delustring PBT and PET polyester; Its cross section is the peanut type, and this composite fibre only can use DISPERSE DYES under normal pressure, to dye, and the use of dyestuff is restricted; Especially with blending such as wool after, the selection of its dyeing, dyestuff all is restricted.
Given this, the present invention is proposed.
Summary of the invention
An object of the present invention is to provide a kind of modified polyester complex fiber, this composite fibre can adopt ACID DYES normal pressure or disperse dyes to carry out under the lower temperature of normal pressure, dyeing, and COLOR FASTNESS is high, and elasticity is high, comfortable feel.
Another object of the present invention provides a kind of preparation method of above-mentioned modified polyester complex fiber.
For realizing that first purpose of the present invention provides a kind of modified polyester complex fiber; This composite fibre is to be composited by modified poly ester and thermoplastic resin; Wherein modified poly ester accounts for the 10%-90% of composite fibre gross weight, contains following construction unit in the described modified poly ester structure:
1＜m wherein
1＜160; 1＜m
2＜70; 0≤m
3＜20; 0≤m
4＜20.
Described modified poly ester is preferred:
Preferably, 10＜m
1＜100,10＜m
2＜30,0≤m
3＜10,0≤m
4＜10.
More preferably 10＜m
1＜100,10＜m
2＜30,0≤m
3＜5,0≤m
4＜5, and m
3And m
4Be not 0 simultaneously.
The intrinsic viscosity of described modified poly ester is 0.80～0.90dL/g, and TENSILE STRENGTH is 40～80MPa, and elongation at break is 10～80%, and content of carboxyl end group is less than 18mol/t, and diethylene glycol (DEG) content is less than 1.0%.
Modified poly ester of the present invention is to be that 1.5～2.2 nylon 6 copolymerization form by polyester and relative viscosity.
The mass content of said nylon 6 is 5-30%, preferred 10-20%.
In the differential scanning calorimetry of modified poly ester of the present invention (DSC) spectrogram, its glass transition temperature and melting peak all have only one, and its melting range is 150-250 ℃.
Preferably contain multiple polyester in the structure of modified poly ester provided by the present invention, its TENSILE STRENGTH, tension fracture elongation rate have obtained significant raising, and the sequence more even distribution of polyamide in the structure of this copolymer; Thereby modification has also been carried out in the dyeing to polyester, acid dyeable, and it is more even to dye; Be not prone to aberration; The DISPERSE DYES dye-uptake is high, can realize and the one-bath process of wool, and the rate of dyeing height.
Described thermoplastic resin comprises: polybutylene terephthalate (PBT) (PBT), polytrimethylene terephthalate (PTT), nylon 6 (PA6), nylon 66 (PA66), polypropylene (PP), polyethylene (PE), polyphenylene sulfide (PPS), gather naphthalenedicarboxylic acid ethylene glycol (PEN) etc., wherein preferred polybutylene terephthalate (PBT), polytrimethylene terephthalate or nylon 6.
Preferred described modified poly ester accounts for the 30%-70% of composite fibre gross weight.
The cross sectional shape of described modified polyester complex fiber is core-skin type, eccentric sheath core pattern, parallel type or chrysanthemum lobe type etc.
When the cross sectional shape of modified polyester complex fiber was core-skin type or eccentric sheath core pattern, thermoplastic resin was a sandwich layer, and modified poly ester is a cortex.
Described modified polyester complex fiber can be processed long filament, short silk, compound FDY fiber, POY fiber or add elater etc.
The fiber number of described modified polyester complex fiber long filament is 0.5～6dtex, and fracture strength is 1.5～5.5cN/dtex, and elongation at break is 5～130%, and modulus is 20～100cN/dtex; It is 1.2～5.0dtex that described modified polyester complex fiber adds the elater fiber number, and fracture strength is 1.8～3.5cN/dtex, and elongation at break is 15～45%; The short silk of described modified polyester complex fiber comprises cotton-type short fiber and wool type staple fibre; Wherein the fiber number of cotton-type short fiber is that 1～3.5dtex, shearing length are that 30～70mm, fracture strength are 1.5～5.7cN/dtex; Extension at break is 15～80%; Modulus is 20～80cN/dtex, and crispation number is 10～20/25mm, and the fiber number of wool type staple fibre is that 2.0～5.5dtex, shearing length are that 60～90mm, fracture strength are that 1.5～5.7cN/dtex, extension at break are 15～80%; Modulus is 20～80cN/dtex, and crispation number is 10～20/25mm.
The preparation method of above-mentioned modified polyester complex fiber comprises the steps:
(1) modified poly ester and thermoplastic resin being got into separately independently screw extruder respectively, is that 150～320 ℃ of following fusions become melt in temperature;
(2) two kinds of melts get into composite spining modules, in composite spining module, are compound after the spinnerets ejection obtains modified polyester complex fiber through follow-up processing again under 200～320 ℃ the condition in temperature.
Above-mentioned preparation method, the speed of collecting with 200～1800m/min that sprays through spinnerets obtains modified polyester complex fiber long filament spun filament or staple fibre spun filament.
Above-mentioned preparation method is characterized in that, in step (2), through the silk of spinnerets ejection, obtains the compound POY fiber of modified poly ester with the speed of collecting of 2000～4000m/min.
Among the above-mentioned preparation method, after the spinnerets ejection, the silk of ejection directly gets into the first heat dish; Get into the second heat dish again, between first and second heat dish, carry out the drawing-off of fiber, 2～5 times of drafting multiples; The fibre bundle entering up-coiler that coils out from second heat carries out package; Winding speed 3100～5200m/min obtains the compound FDY fiber of modified poly ester behind the coiling, wherein the temperature of the first heat dish is that 75～100 ℃, speed are 800～2000m/min; The temperature of the second heat dish is 120～180 ℃, and speed is 3200～5200m/min.
The above-mentioned composite fibre long filament spun filament that obtains is carried out drawing-off under 20～100 ℃, 1.1～6.5 times of drafting multiples after carrying out HEAT SETTING under 80～200 ℃, batch and obtain the modified polyester complex fiber long filament then.
The above-mentioned compound POY fiber that obtains on elasticizer with 1.3～3 times of the speed drawing-offs of 300～1200m/min; The preheating cabinet temperature is 120～220 ℃, and D/Y is 1.4～2.6,140～200 ℃ of shaping box temperature; Winding speed 800～2200m/min obtains the compound elater that adds of modified poly ester.
The above-mentioned composite fibre staple fibre spun filament that obtains is carried out drawing-off, 1.1～6.5 times of drafting multiples under 20～100 ℃; Being 30～100 ℃ in temperature then curls through crimping machine down; Afterwards after temperature is 80～200 ℃ of following HEAT SETTINGs, cut off and packing obtains the modified poly ester composite short fiber.
Compared with prior art; The beneficial effect of modified polyester complex fiber provided by the invention is: modified polyester complex fiber of the present invention; Owing to adopted the component of modified poly ester as composite fibre, making composite fibre have normal pressure, normal temperature is available ACID DYES and or DISPERSE DYES and need not the excellent properties that carrier dyes.When simultaneously the thermal contraction performance of two components is inconsistent in the modified polyester complex fiber, can give fiber unique from crimp property, this fiber is easier when natural fibre blended, and can effectively improve the elasticity of made fabric, raising comfortable feel property.
Simultaneously this modified polyester complex fiber and wool, cotton etc. natural fibre blended after, temperature is can realize below 100 ℃ batch dying with bathing under normal pressure, greatly reduces the dyeing cost, has better improved fabric combination property and color and luster dealing with various requirements.
The specific embodiment
Embodiment 1
The PETG raw material is 245 ℃ of following fusions, with after the PBT resin vacuumize of second component 280 ℃ of following fusions, two kinds of groups get into after the measuring pump metering separately 70: 30 by weight percentage respectively, and (modified poly ester PET: ratio PBT) gets into eccentric sheath core pattern composite spining module; From the spinnerets ejection, winding speed 600m/min obtains eccentric sheath core pattern modified polyester complex fiber spun filament 280 ℃ of compound down backs; Wherein the modified poly ester component is a cortex; This as-spun fibre is carried out the one-level drawing-off for 75 ℃, 3 times of drafting multiples, 115 ℃ are carried out the secondary drawing-off; 1.4 times of drafting multiples; 150 ℃ are carried out obtaining the pet fiber long filament after the HEAT SETTING, this fibrous fracture intensity 2.75cN/dtex, extension at break 25%; With the gained fiber in bath raio is 1: 20 carmoisine, the dyeing 90 minutes down of 93 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains this modified polyester complex fiber and can reach 83%.Even dyeing, no color differnece.
Embodiment 2
With PETG 255 ℃ of following fusions, with after the PTT resin vacuumize of second component 275 ℃ of following fusions, two kinds of groups get into after the measuring pump metering separately 65: 35 by weight percentage respectively, and (modified poly ester PET: ratio PTT) gets into the parallel type composite spining module; Spray from spinnerets 275 ℃ of compound down backs; Winding speed 2800m/min obtains modified polyester complex fiber POY silk, with on this fiber elasticizer with 1.6 times of the speed drawing-offs of 900m/min; The preheating cabinet temperature is 200 ℃; D/Y is 1.7, and winding speed 1430m/min obtains the compound elater that adds of PETG; This fibrous fracture intensity 2.6cN/dtex, extension at break 29%; With the gained fiber in bath raio is 1: 20 Vickery blue, the dyeing 60 minutes down of 95 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains this modified polyester complex fiber and can reach 81%.Even dyeing, no color differnece.
Embodiment 3
With the PETG raw material 250 ℃ of following fusions, with after the PP resin vacuumize of second component 270 ℃ of following fusions, two kinds of groups get into after the measuring pump metering separately 80: 20 by weight percentage respectively, and (modified poly ester PET: ratio PP) gets into chrysanthemum lobe type composite spining module; From the spinnerets ejection, get into the first heat dish, 80 ℃ of first temperature of heat plate 270 ℃ of compound down backs; Speed 1500m/min; Get into the second heat dish then, 160 ℃ of temperature of heat plate, speed 3750m/min; Carry out the drawing-off of fiber between first, second heat dish, 2.5 times of drafting multiples; The fibre bundle entering up-coiler that comes out from second godet carries out package, and winding speed 3740m/min obtains modified polyester complex fiber FDY silk behind the coiling.This fibrous fracture intensity 2.73cN/dtex, extension at break 33%; With the gained fiber in bath raio is 1: 20 carmoisine, the dyeing 30 minutes down of 92 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains modified polyester complex fiber and can reach 80%.Even dyeing, no color differnece.
Embodiment 4
With the PETG raw material 245 ℃ of following fusions, with after the PA6 resin vacuumize of second component 265 ℃ of following fusions, two kinds of groups get into after the measuring pump metering separately 90: 10 by weight percentage respectively, and (modified poly ester PET: ratio PA66) gets into the core-skin type composite spining module; From the spinnerets ejection, winding speed 800m/min obtains core-skin type modified polyester complex fiber spun filament 265 ℃ of compound down backs; Wherein the modified poly ester component is a cortex, carries out the one-level drawing-off at 55 ℃ then, 3.2 times of drafting multiples; 120 ℃ are carried out the secondary drawing-off; 1.3 times of drafting multiples curl fiber afterwards, carry out HEAT SETTING 15 minutes at 160 ℃ then; Fiber after the typing is obtained fiber number after prescinding on the cutting machine, packing be 1.5dtex, and length is the cotton type modified poly ester composite short fiber of 38mm.This fibrous fracture intensity 2.6cN/dtex, extension at break 35%, 13/25cm of crispation number; With the gained fiber in bath raio is 1: 20 Vickery blue, the dyeing 35 minutes down of 90 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains this cotton type modified polyester complex fiber and can reach 84%.Even dyeing, no color differnece.
Embodiment 5
With the PETG raw material 245 ℃ of following fusions, with after the PA6 resin vacuumize of second component 265 ℃ of following fusions, two kinds of components get into after the measuring pump metering separately 90: 10 by weight percentage respectively, and (modified poly ester PET: ratio PA6) gets into the core-skin type composite spining module; From the spinnerets ejection, winding speed 800m/min obtains core-skin type modified polyester complex fiber spun filament 265 ℃ of compound down backs; Wherein the modified poly ester component is a cortex; Carry out the one-level drawing-off at 55 ℃ then, 3.5 times of drafting multiples, 120 ℃ are carried out the secondary drawing-off; 1.4 times of drafting multiples; Afterwards fiber is curled, carried out HEAT SETTING 14 minutes at 162 ℃ then, the fiber after the typing is obtained fiber number after prescinding on the cutting machine, packing be that 3.2dte, length are the wool type modified poly ester composite short fiber of 78mm.This fibrous fracture intensity 2.9cN/dtex, extension at break 33%, 13/25cm of crispation number; With the gained fiber in bath raio is 1: 25 Vickery blue, the dyeing 30 minutes down of 90 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains this modified polyester complex fiber and can reach 86%.Even dyeing, no color differnece.
Embodiment 6
The structure of the modified poly ester that present embodiment adopts is:
With modified poly ester 255 ℃ of following fusions, with after the PTT resin vacuumize of second component 275 ℃ of following fusions, two kinds of groups get into after the measuring pump metering separately 20: 80 by weight percentage respectively, and (modified poly ester: ratio PTT) gets into the parallel type composite spining module; From the spinnerets ejection, winding speed 3500m/min obtains modified polyester complex fiber POY silk 275 ℃ of compound down backs; With on this fiber elasticizer with 1.6 times of the speed drawing-offs of 1500m/min, the preheating cabinet temperature is 115 ℃, D/Y is 1.4; Winding speed 1430m/min; Obtain the compound elater fiber that adds of modified poly ester, this fibrous fracture intensity 4.6cN/dtex, extension at break 35%; With the gained fiber in bath raio is 1: 20 Vickery blue, the dyeing 60 minutes down of 85 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains this modified polyester complex fiber and can reach 87%.Even dyeing, no color differnece.
Embodiment 7
The structure of the modified poly ester that present embodiment adopts is:
With the modified poly ester raw material 250 ℃ of following fusions, with after the PA6 resin vacuumize of second component 265 ℃ of following fusions, two kinds of components get into after the measuring pump metering separately 10: 90 by weight percentage respectively, and (modified poly ester: ratio PA66) gets into the core-skin type composite spining module; From the spinnerets ejection, winding speed 1500m/min obtains core-skin type modified polyester complex fiber spun filament 265 ℃ of compound down backs; Wherein the modified poly ester component is a cortex, carries out the one-level drawing-off at 80 ℃ then, 4.8 times of drafting multiples; 100 ℃ are carried out the secondary drawing-off; 1.3 times of drafting multiples curl fiber afterwards, carry out HEAT SETTING 15 minutes at 120 ℃ then; Fiber after the typing is obtained fiber number after prescinding on the cutting machine, packing be 3.2dtex, and length is the cotton type modified poly ester composite short fiber of 51mm.This fibrous fracture intensity 4.2cN/dtex, extension at break 35%, 16/25cm of crispation number; With the gained fiber in bath raio is 1: 20 Vickery blue, the dyeing 35 minutes down of 90 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains this cotton type modified polyester complex fiber and can reach 85%.Even dyeing, no color differnece.
Embodiment 8
The structure of the modified poly ester that present embodiment adopts is:
With the modified poly ester raw material 275 ℃ of following fusions, with after the PPS resin vacuumize of second component 310 ℃ of following fusions, two kinds of components get into after the measuring pump metering separately 60: 40 by weight percentage respectively, and (modified poly ester: ratio PPS) gets into eccentric sheath core pattern composite spining module; From the spinnerets ejection, winding speed 600m/min obtains eccentric sheath core pattern modified polyester complex fiber spun filament 310 ℃ of compound down backs; Wherein the modified poly ester component is a cortex; This as-spun fibre is carried out the one-level drawing-off for 75 ℃, 3 times of drafting multiples, 120 ℃ are carried out the secondary drawing-off; 1.4 times of drafting multiples; 160 ℃ are carried out obtaining the modified polyester complex fiber long filament after the HEAT SETTING, this fibrous fracture intensity 3.75cN/dtex, extension at break 25%; With the gained fiber in bath raio is 1: 20 carmoisine, the dyeing 90 minutes down of 93 ℃ of normal pressures, dried after being washed detects the dye-uptake that obtains this modified polyester complex fiber and can reach 83%.Even dyeing, no color differnece.
Claims (11)
1. modified polyester complex fiber; This composite fibre is to be composited by modified poly ester and thermoplastic resin; Wherein modified poly ester accounts for the 10%-90% of composite fibre gross weight; Thermoplastic resin accounts for the 10%-90% of composite fibre gross weight, contains following construction unit in the described modified poly ester structure:
10＜m wherein
1＜100,10＜m
2＜30,0≤m
3＜5,0≤m
4＜5, and m
3And m
4Be not 0 simultaneously,
The intrinsic viscosity of described modified poly ester is 0.80～0.90dL/g, and TENSILE STRENGTH is 40～80MPa, and elongation at break is 10～80%, and content of carboxyl end group is less than 18mol/t, and diethylene glycol (DEG) content is less than 1.0%;
Described modified poly ester is to be that 1.5～2.2 nylon 6 copolymerization form by polyester and relative viscosity.
2. composite fibre according to claim 1; It is characterized in that described thermoplastic resin is: polybutylene terephthalate (PBT), polytrimethylene terephthalate, nylon 6, nylon 66, polypropylene, polyethylene, polyphenylene sulfide, PEN.
3. composite fibre according to claim 2 is characterized in that, described thermoplastic resin is: polybutylene terephthalate (PBT), polytrimethylene terephthalate or nylon 6.
4. composite fibre according to claim 1 is characterized in that, the cross sectional shape of described modified polyester complex fiber is core-skin type, parallel type or chrysanthemum lobe type.
5. composite fibre according to claim 4 is characterized in that, described core-skin type is the eccentric sheath core pattern.
6. composite fibre according to claim 1 is characterized in that, described modified polyester complex fiber is processed long filament, short silk, compound FDY fiber, POY fiber or added elater;
The fiber number of wherein said long filament is 0.5～6dtex, and fracture strength is 1.5～5.5cN/dtex, and elongation at break is 5～130%, and modulus is 20～100cN/dtex;
The described fiber number that adds elater is 1.2～5.0dtex, and fracture strength is 1.8～3.5cN/dtex, and elongation at break is 15～45%;
Described short silk comprises cotton-type short fiber and wool type staple fibre; Wherein the fiber number of cotton-type short fiber is that 1～3.5dtex, shearing length are that 30～70mm, fracture strength are that 1.5～5.7cN/dtex, extension at break are 15～80%, modulus is that 20～80cN/dtex, crispation number are 10～20/25mm, and the fiber number of wool type staple fibre is that 2.0～5.5dtex, shearing length are that 60～90mm, fracture strength are that 1.5～5.7cN/dtex, extension at break are 15～80%, modulus is that 20～80cN/dtex, crispation number are 10～20/25mm.
7. the preparation method of each described modified polyester complex fiber of claim 1-6 comprises the steps:
(1) modified poly ester and thermoplastic resin being got into separately independently screw extruder respectively, is that 150～320 ℃ of following fusions become melt in temperature;
(2) two kinds of melts get into composite spining modules, in composite spining module, are compound after the spinnerets ejection obtains modified polyester complex fiber through follow-up processing again under 200～320 ℃ the condition in temperature.
8. preparation method according to claim 7 is characterized in that, in step (2), through the silk of spinnerets ejection, obtains modified polyester complex fiber long filament spun filament or staple fibre spun filament with the speed of collecting of 200～1800m/min.
9. preparation method according to claim 7 is characterized in that, in step (2), through the silk of spinnerets ejection, obtains the compound POY fiber of modified poly ester with the speed of collecting of 2000～4000m/min.
10. preparation method according to claim 7 is characterized in that, in step (2) after spinnerets ejection; The silk of ejection directly gets into the first heat dish, gets into the second heat dish again, between first and second heat dish, carries out the drawing-off of fiber; 2～5 times of drafting multiples, the fibre bundle entering up-coiler that coils out from second heat carries out package, winding speed 3100～5200m/min; Obtain the compound FDY fiber of modified poly ester behind the coiling; Wherein the temperature of the first heat dish is that 75～100 ℃, speed are 800～2000m/min, and the temperature of the second heat dish is 120～180 ℃, and speed is 3200～5200m/min.
11. according to Claim 8 or 9 described preparation methods; It is characterized in that described composite fibre long filament spun filament is carried out drawing-off under 20～100 ℃, 1.1～6.5 times of drafting multiples; After carrying out HEAT SETTING under 80～200 ℃, batch and obtain the modified polyester complex fiber long filament then; Described compound POY fiber on elasticizer with 1.3～3 times of the speed drawing-offs of 300～1200m/min; The preheating cabinet temperature is 120～220 ℃, and D/Y is 1.4～2.6,140～200 ℃ of shaping box temperature; Winding speed 800～2200m/min obtains the compound elater that adds of modified poly ester; Described composite fibre staple fibre spun filament is carried out drawing-off under 20～100 ℃; 1.1～6.5 times of drafting multiples; Being 30～100 ℃ in temperature then curls through crimping machine down; Afterwards after temperature is 80～200 ℃ of following HEAT SETTINGs, cut off and packing obtains the modified poly ester composite short fiber.
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| CN103981580B (en) * | 2014-05-23 | 2016-06-29 | 苏州大学 | A kind of polyamide 6 POY/FDY composite fibre and preparation method thereof |
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| CN101450990B (en) * | 2007-12-06 | 2011-06-08 | 中国纺织科学研究院 | Acidic dyeable polyester and method for preparing acidic dyeable polyester and fiber thereof |
| CN101613894B (en) * | 2009-08-06 | 2011-08-10 | 浙江理工大学 | Preparation method of dyeable polyester composite fiber of cationic dye |
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