CN105603597A - Two-component multifilament - Google Patents
Two-component multifilament Download PDFInfo
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- CN105603597A CN105603597A CN201410679311.5A CN201410679311A CN105603597A CN 105603597 A CN105603597 A CN 105603597A CN 201410679311 A CN201410679311 A CN 201410679311A CN 105603597 A CN105603597 A CN 105603597A
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Abstract
The invention relates to a two-component multifilament. A fiber-forming polymer of the two-component multifilament comprises a thermoplastic polymer A and a thermoplastic polymer B, wherein the two-component multifilament is formed by 20-200 single fibers; a component A and a component B on a single fiber section are arranged at intervals; boundary lines are formed between the component A and the component B; the boundary lines are arc-shaped; the number of the boundary lines is 0-n; n is greater than or equal to 1 and less than or equal to 10. The single fibers of the multifilament have great structure difference, different polymer composition ratios and different section shapes, thus shrinkage difference is formed among the single fibers, so that fabrics formed by the multifilament have excellent shrinkage performance, natural stripe feeling and full hand feeling.
Description
Technical field
The present invention relates to a kind of chemical fibre, particularly relate to a kind of multifilament of bicomponent fibre.
Background technology
Wool fabric is the one in natural fabric, and the good good hand touch of its lightweight warmth retention property, firmly gets liking of consumer. Researcher conducts in-depth research the structure of wool, finds that the cross section of wool is different from other natural fiber, and it is by being approximately two semicircles, the orthocortex and the paracortex that hold tightly together form each other. The character of these two-part various construction units (fento crystal region and region of disorder etc.) and arrangement are different. Smaller in drying regime paracortex shrinkage ratio orthocortex, therefore cause along fiber axis to mutually around or rive off mutually, and it is curling to present spiral helicine main body.
Researcher has developed bi-component parallel composite fiber under the bionical enlightenment of wool class angle protein fiber, has highly naturally curling and bulkiness, thereby has obtained in chemical fibre field the crimpiness elasticity that is similar to natural wool.
The common method for making of this bi-component parallel composite fiber is: by hot swell-shrink characteristic or the different two kinds of polymer (being similar to two kinds of cortex of sheepskin) of wet swell-shrink characteristic, be transported to respectively same filament spinning component, after spinneret position is converged, ejection is spun into a monofilament side by side, the monofilament of many forms the multifilament of bi-component parallel composite fiber, obtain making the composite fibre in fabric shrink the spiral helicine conjugate of formation by heating after fabric, give elasticity and elastic recovery rate that fabric is good. Have due to this curling inwardness that comes from fiber, thereby the curling and deformation that applies heat and mechanism by outside from general fiber is different, has stronger curling durability.
Chinese patent CN101851812A discloses and has a kind ofly been carried out processing through false twisting the parallel composite elastic fiber making after composite spinning arranged side by side with the weight ratio of 70:30～30:70 by polybutylene terephthalate (PBT) and PETG. Although the good springiness of this composite elastic fiber, elastic recovery rate is high, and Performance Ratio is more single, and production cost is high simultaneously.
In addition, Chinese patent CN101126180A discloses a kind of composite elastic fiber arranged side by side and preparation method thereof, compound side by side by adopting the high any two kinds of polymer that shrink in PET, PET, PBT or PTT to carry out, make the peanut shaped section composite fiber that compound interface is present in short-axis direction. This fiber can be found out from fiber cross section, the centroidal distance of two kinds of compound polymer is larger than typical circular, this has also caused the parallel composite fiber of this non-circular cross-section shape after extending heat treatment, the spring-like producing in the unit length number of crispaturaing is on the low side, and elastic performance can not fully meet the demands. And production cost is higher simultaneously.
For traditional bi-component parallel composite fiber, because the difference such as proportioning, viscosity of two kinds of fibre-forming polymers need to design corresponding spinneret, and the manufacturing cost of spinneret is higher, so the switching of fibre-forming polymer and the switching of kind are more numerous and diverse. And traditional composite fibre target is mainly to focus on the elasticity of fiber, for the characteristic of giving other need to be carried out various processing, such as produce natural spot sense after giving its dyeing, need to carry out slub yarn processing etc. In addition, in traditional bi-component parallel composite fiber, every filamentary composition is substantially similar, and identical polymer proportioning is also restricted the style of its fabric.
Summary of the invention
The object of the present invention is to provide a kind of the have excellent performance of crispaturaing, good springiness, the bi-component multifilament that elastic recovery rate is high.
Technical scheme of the present invention is as follows:
A kind of bi-component multifilament, the fibre-forming polymer of this bi-component multifilament is thermoplastic polymer A and thermoplastic polymer B, described bi-component multifilament is made up of 20～200 ultimate fibres, on ultimate fibre section, A composition and B composition are spaced, and there is the line of demarcation of A composition and B composition, line of demarcation is arc, and marginal radical is respectively 0～n root, wherein 1≤n≤10.
In described bi-component multifilament, 50%～90% ultimate fibre line of demarcation end points is on ultimate fibre surface, and 10%～50% ultimate fibre line of demarcation end points is in ultimate fibre inside.
The crispation number of described bi-component multifilament is preferably 10～75/25mm.
The elastic extension of described bi-component multifilament is preferably 50～150%, and elastic recovery rate is preferably 80～100%.
Poor 0.05～the 1.05dl/g that is preferably of inherent viscosity of described thermoplastic polymer A and thermoplastic polymer B.
Described thermoplastic polymer A is disperse dye dyeable polyester, and thermoplastic polymer B is cation dyeable polyester; Or thermoplastic polymer A is conventional polyester, thermoplastic polymer B is the polyester copolymerization that comprises the 3rd monomer; Or thermoplastic polymer A is polybutylene terephthalate (PBT) or PTT, thermoplastic polymer B is PETG.
Between each ultimate fibre of described bi-component multifilament, elastic elongation rate variance is preferably below 80%. Between each ultimate fibre of bi-component multifilament, boiling shrinkage is poor is preferably below 10%, and xeothermic contraction difference is preferably below 15%.
The difference existing between ultimate fibre, in such scope, can reach the soft sense of touch of needs of the present invention and process the natural spot sense after dyeing.
Gained bi-component multifilament of the present invention has good spinning property, and physical property is close with general collateral fiber. The fiber making has good elasticity, crimp property, and the fabric that multifilament forms has the excellent performance of crispaturaing, natural striped sense and plentiful feel. The method production cost is low in addition, easy operating.
Brief description of the drawings
Fig. 1 is the shape of cross section schematic diagram of bi-component multifilament of the present invention.
Detailed description of the invention
For a kind of excellent performance of crispaturaing that has is provided, good springiness, the bi-component multifilament that elastic recovery rate is high, technical scheme of the present invention is as follows:
A kind of bi-component multifilament, the fibre-forming polymer of this bi-component multifilament is thermoplastic polymer A and thermoplastic polymer B, described bi-component multifilament is made up of 20～200 ultimate fibres, on ultimate fibre section, A composition and B composition are spaced, and there is the line of demarcation of A composition and B composition, line of demarcation is arc, and marginal radical is respectively 0～n root, wherein 1≤n≤10.
Bi-component multifilament of the present invention, is made up of 20～200 ultimate fibres. Single fiber dimension is less than 20, and because ultimate fibre radical is few, thereby the difference existing between ultimate fibre and ultimate fibre is little, cannot form the sense of touch of needed softness and process the natural spot sense after dyeing. Single fiber dimension is greater than 200, and the performance of multifilament does not change, but spinnability decline, and cost increases.
In described bi-component multifilament, 50%～90% ultimate fibre line of demarcation end points is on ultimate fibre surface, and 10%～50% ultimate fibre line of demarcation end points is in ultimate fibre inside.
The crispation number of described bi-component multifilament is preferably 10～75/25mm.
The elastic extension of described bi-component multifilament is preferably 50～150%, and elastic recovery rate is preferably 80～100%.
Bi-component multifilament of the present invention under nature, be curly form, and curling number is 10～75/25mm. Due to the desired spring-like wrapped configuration of elastic material, the crispation number in unit length is more, and the elasticity retentivity producing is more for excellent, and meanwhile, after drawn, in Recovery Process, flexible loss is also little.
Produce above-mentioned curling number, the cross section shapes of composite fibre and the inherent viscosity of polymer are all unusual significant design key elements. The cross section shapes of bicomponent composite fibre of the present invention is that on ultimate fibre section, A composition and B composition are spaced, and has the line of demarcation of A composition and B composition, and line of demarcation is arc, and marginal radical is respectively 0～n root, wherein 1≤n≤10. That is to say, in same multifilament, each ultimate fibre contains different A compositions and B composition, and the line of demarcation radical of each ultimate fibre A composition and B composition distributes between 0～n, thereby also there are differences between ultimate fibre in same multifilament. And line of demarcation is that arc is also characteristic of the present invention, like this, ultimate fibre has spiral helicine conjugate, and different ultimate fibres makes again multifilament entirety also produce peculiar different shrinkage, thereby fabric can obtain plentiful feel or soft sense of touch.
In order to obtain above-mentioned multifilament, the marginal radical of A composition and B composition is respectively 0～n root, wherein 1≤n≤10. If marginal radical is greater than 10, production cost increases, and spinning properties declines. Preferably the marginal radical of A composition and B composition is respectively 0～n root, and 1≤n≤6, in such scope, can obtain good spinning properties and good natural spot sense.
In bi-component multifilament of the present invention, between ultimate fibre, deposit architectural difference and performance difference, producing the mixed fine effect that is similar to different fiber; And difference between ultimate fibre has multiple, that can enumerate has the 2 arranged side by side of single composition A, single composition B, AB type, ABA type 3 arranged side by side, ABAB type 4 arranged side by side etc., and, even identical line of demarcation radical, such as be 3 time arranged side by side of ABA type equally, in such collateral fiber, the proportioning of polymer also there are differences. Further, in described bi-component multifilament, line of demarcation is arc, and 50%～90% ultimate fibre line of demarcation end points is on ultimate fibre surface, and 10%～50% ultimate fibre line of demarcation end points is in ultimate fibre inside. These different architectural differences bring different shrinkage difference, and the fabric of its formation thereby have the excellent performance of crispaturaing, naturally striped sense and plentiful feel has produced beyond thought effect.
Poor 0.05～the 1.05dl/g that is preferably of inherent viscosity of described thermoplastic polymer A and thermoplastic polymer B. Have such inherent viscosity difference, make it to shrink by heating, can obtain the line of demarcation of arc, form filamentary spiral helicine conjugate, if inherent viscosity is poor lower than 0.05dl/g, composite fiber elastic is not obvious; The poor increase of inherent viscosity, elastic performance improves, after differences in viscosity is higher than 1.05dl/g, composite fiber elastic performance raising degree reduces, and high viscosity missionary society causes spinnability variation, and it is large that spinneret aperture curvature effect becomes, difficulty in spinning, therefore selectivity characteristic differences in viscosity is 0.05～1.05dl/g, invents effectively, and more preferably inherent viscosity is poor is 0.15～1.05dl/g.
There is no particular limitation in the combination of described thermoplastic polymer A and thermoplastic polymer B, can have a variety ofly, and preferred combination is: thermoplastic polymer A is disperse dye dyeable polyester, and thermoplastic polymer B is cation dyeable polyester; Or thermoplastic polymer A is conventional polyester, thermoplastic polymer B is the polyester copolymerization that comprises the 3rd monomer; Or thermoplastic polymer A is polybutylene terephthalate (PBT) or PTT, thermoplastic polymer B is PETG.
Between each ultimate fibre of described bi-component multifilament, elastic elongation rate variance is preferably below 80%. Between each ultimate fibre of bi-component multifilament, boiling shrinkage is poor is preferably below 10%, and xeothermic contraction difference is preferably below 15%.
The difference existing between ultimate fibre, in such scope, can reach the soft sense of touch of needs of the present invention and process the natural spot sense after dyeing.
Gained bi-component multifilament of the present invention has good spinning property, and physical property is close with general collateral fiber. The fiber making has good elasticity, crimp property, and the fabric that multifilament forms has the excellent performance of crispaturaing, natural striped sense and plentiful feel. The method production cost is low in addition, easy operating.
Implementation method of the present invention, can enumerate fusion method and prepare bi-component multifilament. Choose the polymer that inherent viscosity is different and carry out spinning. Dry respectively, make its moisture be less than 100ppm, dried polymer is dropped into respectively to manifold No. 1/No. 2 with certain weight ratio. Set spinning temperature, adopt the spinning technique of two-step method, under certain speed, batch, make multifilament preoriented yarn, and the preoriented yarn making is carried out to false twisting processing on false twisting machine.
Fibrous physical property mentioned in this explanation is measured according to the methods below.
(1) crispation number
A. multifilament fiber is taken off from silk volume, and it is placed on black cardboard freely, leave standstill 2 hours;
B. the cardboard that is loaded with fiber is examined under a microscope, and a ruler is close to fiber simultaneously and is placed, in field of microscope, observe the fiber of scale and curling shape simultaneously;
C. in field of microscope, directly measure the curved height of fiber roll, be crimp diameter, thereby learn crimp radius, measure 10 points, average;
D. in field of microscope, number goes out the fiber crimp number in 25mm length range, reads 5 sections and averages.
(2) elastic extension and elastic recovery rate
Adopt following formula to calculate:
Elastic extension (%)=((L1-L0）/L0）*100%
Elastic recovery rate (%)=((L1-L2）/（L1-L0））*100%
L0: multifilament fiber is under the first loading that hangs with 2mg/d, and after the hot water treatment 2min with 90 degree, then to hang the length recording after drying for 12 hours be L0；
L1：L0After mensuration, remove L0First loading when mensuration, hangs up the loading of determining of 100mg/d after 2min, the length recording after 30 seconds is L1；
L2：L1After mensuration, remove L1When mensuration, determine loading, after 2min, again hang up the first loading of 2mg/d, after 30 seconds, recording length is L2。
(3) boiling water shrinkage
Adopt following formula to calculate:
Boiling water shrinkage (%)=((L0-L）/L0）*100%
A. use thread yarn horizontal metroscope to sample (10 circle × 1m/ circle)
B. hang up and determine loading (0.1g/D) mensuration multifilament specimen length L0，
It is C.100 more than 12 hours natural drying after DEG C boiling water treating 30min,
D. again hang up and determine loading (0.1g/D) mensuration specimen length L.
(4) dry-hot shrinkage
Adopt following formula to calculate:
Dry-hot shrinkage (%)=((L0-L）/L0）*100%
A. use thread yarn horizontal metroscope to sample (10 circle × 1m/ circle)
B. hang up and determine loading (0.1g/D) mensuration multifilament specimen length L0，
C.180 in DEG C drying box, process after 15min 12 hours above natural drying,
D. again hang up and determine loading (0.1g/D) mensuration specimen length L.
(5) inherent viscosity
A certain amount of section is dissolved in o-chlorphenol to test at 25 DEG C.
Below by specific embodiment, the invention will be further described. Following examples should not regarded limitation of the present invention as.
Embodiment 1
Fusion method is prepared bi-component multifilament, chooses inherent viscosity and is the disperse dye dyeable polyester of 0.51dl/g and cation dyeable polyester that inherent viscosity is 0.73dl/g and carry out composite spinning, and their inherent viscosity is poor is 0.22dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 280 DEG C of No. 1 extruder screw temperature; 290 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 280 DEG C; No. 2 spinning body temperature is 290 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min in speed, batch, make multifilament preoriented yarn, use microscopic, on its ultimate fibre section, line of demarcation has difference, is 0 ~ 6, line of demarcation mostly is 6 most, line of demarcation is arc, and wherein 70% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Embodiment 2
Fusion method is prepared bi-component multifilament, chooses the high-contraction polyester that conventional polyester that inherent viscosity is 0.51dl/g and inherent viscosity are 0.665dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.16dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 280 DEG C of No. 1 extruder screw temperature; 275 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 280 DEG C; No. 2 spinning body temperature is 275 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min in speed, batch, make multifilament preoriented yarn, use microscopic, on its ultimate fibre section, line of demarcation has difference, is 0 ~ 6, line of demarcation mostly is 6 most, line of demarcation is arc, and wherein 75% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Embodiment 3
Fusion method is prepared bi-component multifilament, chooses the cation dyeable polyester that conventional polyester that inherent viscosity is 0.65dl/g and inherent viscosity are 0.730dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.08dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 285 DEG C of No. 1 extruder screw temperature; 290 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 285 DEG C; No. 2 spinning body temperature is 290 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min in speed, batch, make multifilament preoriented yarn, use microscopic, on its ultimate fibre section, line of demarcation has difference, is 0 ~ 6, line of demarcation mostly is 6 most, line of demarcation is arc, and wherein 80% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Embodiment 4
Fusion method is prepared bi-component multifilament, chooses the PETG that polybutylene terephthalate (PBT) that inherent viscosity is 1.31dl/g and inherent viscosity are 0.51dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.80dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 257 DEG C of No. 1 extruder screw temperature; 280 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 257 DEG C; No. 2 spinning body temperature is 280 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min in speed, batch, make multifilament preoriented yarn, use microscopic, on its ultimate fibre section, line of demarcation has difference, is 0 ~ 6, line of demarcation mostly is 6 most, line of demarcation is arc, and wherein 55% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Embodiment 5
Fusion method is prepared bi-component multifilament, chooses the PETG that PTT that inherent viscosity is 1.31dl/g and inherent viscosity are 0.51dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.80dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 260 DEG C of No. 1 extruder screw temperature; 280 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 260 DEG C; No. 2 spinning body temperature is 280 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min in speed, batch, make multifilament preoriented yarn, use microscopic, on its ultimate fibre section, line of demarcation has difference, is 0 ~ 6, line of demarcation mostly is 6 most, line of demarcation is arc, and wherein 55% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Embodiment 6
Fusion method is prepared bi-component multifilament, chooses the PETG that polybutylene terephthalate (PBT) that inherent viscosity is 1.31dl/g and inherent viscosity are 0.51dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.80dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 257 DEG C of No. 1 extruder screw temperature; 280 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 257 DEG C; No. 2 spinning body temperature is 280 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min in speed, batch, make multifilament preoriented yarn, use microscopic, on its ultimate fibre section, line of demarcation has difference, is 0 ~ 2, line of demarcation mostly is 2 most, line of demarcation is arc, and wherein 80% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Embodiment 7
Fusion method is prepared bi-component multifilament, chooses the PETG that polybutylene terephthalate (PBT) that inherent viscosity is 1.31dl/g and inherent viscosity are 0.51dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.80dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 257 DEG C of No. 1 extruder screw temperature; 280 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 257 DEG C; No. 2 spinning body temperature is 280 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min in speed, batch, make multifilament preoriented yarn, use microscopic, on its ultimate fibre section, line of demarcation has difference, is 0 ~ 10, line of demarcation mostly is 10 most, line of demarcation is arc, and wherein 50% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Comparative example 1
Fusion method is prepared bi-component multifilament, chooses the PETG that polybutylene terephthalate (PBT) that inherent viscosity is 1.31dl/g and inherent viscosity are 0.51dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.80dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 257 DEG C of No. 1 extruder screw temperature; 280 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 257 DEG C; No. 2 spinning body temperature is 280 DEG C. The spinning technique that adopts two-step method, batches under the condition that is 2700m/min in speed, and making line of demarcation is only 1 preoriented yarn, and wherein 100% ultimate fibre line of demarcation end points is at fiber surface, and line of demarcation is linearly, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Comparative example 2
Fusion method is prepared bi-component multifilament, chooses the high-contraction polyester that conventional polyester that inherent viscosity is 0.65dl/g and inherent viscosity are 0.665dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.02dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 285 DEG C of No. 1 extruder screw temperature; 275 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 285 DEG C; No. 2 spinning body temperature is 275 DEG C. The spinning technique that adopts two-step method, batches under the condition that is 2700m/min in speed, makes line of demarcation and mostly is 8 preoriented yarns most, and wherein 95% ultimate fibre line of demarcation end points is at fiber surface, and its spinnability is good; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Comparative example 3
Fusion method is prepared bi-component multifilament, chooses the PETG that polybutylene terephthalate (PBT) that inherent viscosity is 1.31dl/g and inherent viscosity are 0.51dl/g and carries out composite spinning, and their inherent viscosity is poor is 0.80dl/g. Dry respectively, make its moisture be less than 100ppm, dried disperse dye dyeable polyester and cation dyeable polyester are dropped into respectively to manifold No. 1/No. 2 with the weight ratio of 50: 50. Set spinning temperature, 257 DEG C of No. 1 extruder screw temperature; 280 DEG C of No. 2 spinning-drawing machine extruder temperatures; No. 1 spinning body temperature is 257 DEG C; No. 2 spinning body temperature is 280 DEG C. Adopt the spinning technique of two-step method, under the condition that is 2700m/min, batch in speed, make line of demarcation and mostly be 12 preoriented yarns most, wherein 40% ultimate fibre line of demarcation end points is at fiber surface, its spinnability variation; And the preoriented yarn making is carried out on false twisting machine to false twisting processing, and the kind of final false twist yarn is 84dtex/72F, filament number is 2.33dtex. And by this multifilament cylinder editorial afterword dyeing processing.
Observe the shape of cross section of composite fibre, measure and extend between silk intensity, elongation at break, curling number, elastic extension, elastic recovery rate, monofilament between elastic elongation rate variance (MAX), monofilament between boiling shrinkage rate variance (MAX), monofilament spot sense after the poor and dyeing of dry-hot shrinkage. Concrete numerical value is in table 1.
Claims (10)
1. a bi-component multifilament, it is characterized in that: the fibre-forming polymer of described bi-component multifilament is thermoplastic polymer A and thermoplastic polymer B, described bi-component multifilament is made up of 20～200 ultimate fibres, on ultimate fibre section, A composition and B composition are spaced, and there is the line of demarcation of A composition and B composition, line of demarcation is arc, and marginal radical is respectively 0～n root, wherein 1≤n≤10.
2. bi-component multifilament according to claim 1, is characterized in that: in described bi-component multifilament, 50%～90% ultimate fibre line of demarcation end points is on ultimate fibre surface, and 10%～50% ultimate fibre line of demarcation end points is in ultimate fibre inside.
3. bi-component multifilament according to claim 1 and 2, is characterized in that: the crispation number of described bi-component multifilament is 10～75/25mm.
4. bi-component multifilament according to claim 1 and 2, is characterized in that: the elastic extension of described bi-component multifilament is 30%～150%, and elastic recovery rate is 50%～100%.
5. bi-component multifilament according to claim 1 and 2, is characterized in that: the poor 0.05～1.05dl/g of being of inherent viscosity of described thermoplastic polymer A and thermoplastic polymer B.
6. bi-component multifilament according to claim 5, is characterized in that: described thermoplastic polymer A is disperse dye dyeable polyester, and described thermoplastic polymer B is cation dyeable polyester.
7. bi-component multifilament according to claim 5, is characterized in that: described thermoplastic polymer A is conventional polyester, and described thermoplastic polymer B is the polyester copolymerization that comprises the 3rd monomer.
8. bi-component multifilament according to claim 5, is characterized in that: described thermoplastic polymer A is polybutylene terephthalate (PBT) or PTT, and described thermoplastic polymer B is PETG.
9. bi-component multifilament according to claim 1 and 2, is characterized in that: between each ultimate fibre of described bi-component multifilament, elastic elongation rate variance is below 80%.
10. bi-component multifilament according to claim 1 and 2, is characterized in that: between each fiber of described bi-component multifilament boiling shrinkage poor be below 10%, xeothermic contraction difference is below 15%.
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| CN110067040A (en) * | 2018-01-24 | 2019-07-30 | 东丽纤维研究所（中国）有限公司 | A kind of high strength elastic fiber and preparation method thereof and fabric |
| CN111005083A (en) * | 2019-12-24 | 2020-04-14 | 江苏恒力化纤股份有限公司 | Parallel self-crimping POY-DT silk elastic fiber and preparation method thereof |
| CN111041578A (en) * | 2019-12-24 | 2020-04-21 | 江苏恒力化纤股份有限公司 | PET (polyethylene terephthalate) double-component elastic yarn with different viscosities and preparation method thereof |
| CN114280280A (en) * | 2021-12-24 | 2022-04-05 | 中复神鹰碳纤维股份有限公司 | Method for testing number of carbon fiber multifilament |
| CN115667600A (en) * | 2020-08-10 | 2023-01-31 | 东丽纤维研究所（中国）有限公司 | Multi-layer section composite fiber and fabric thereof |
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- 2014-11-24 CN CN201410679311.5A patent/CN105603597A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110067040A (en) * | 2018-01-24 | 2019-07-30 | 东丽纤维研究所（中国）有限公司 | A kind of high strength elastic fiber and preparation method thereof and fabric |
| CN111005083A (en) * | 2019-12-24 | 2020-04-14 | 江苏恒力化纤股份有限公司 | Parallel self-crimping POY-DT silk elastic fiber and preparation method thereof |
| CN111041578A (en) * | 2019-12-24 | 2020-04-21 | 江苏恒力化纤股份有限公司 | PET (polyethylene terephthalate) double-component elastic yarn with different viscosities and preparation method thereof |
| CN111041578B (en) * | 2019-12-24 | 2022-03-18 | 江苏恒力化纤股份有限公司 | PET (polyethylene terephthalate) double-component elastic yarn with different viscosities and preparation method thereof |
| CN115667600A (en) * | 2020-08-10 | 2023-01-31 | 东丽纤维研究所（中国）有限公司 | Multi-layer section composite fiber and fabric thereof |
| CN115667600B (en) * | 2020-08-10 | 2024-07-02 | 东丽纤维研究所（中国）有限公司 | Multi-layer section composite fiber and fabric thereof |
| CN114280280A (en) * | 2021-12-24 | 2022-04-05 | 中复神鹰碳纤维股份有限公司 | Method for testing number of carbon fiber multifilament |
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