CN102242410A - Method for melting spinning and flexible blowing of fibers and product thereof - Google Patents
Method for melting spinning and flexible blowing of fibers and product thereof Download PDFInfo
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- CN102242410A CN102242410A CN2011101917781A CN201110191778A CN102242410A CN 102242410 A CN102242410 A CN 102242410A CN 2011101917781 A CN2011101917781 A CN 2011101917781A CN 201110191778 A CN201110191778 A CN 201110191778A CN 102242410 A CN102242410 A CN 102242410A
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Abstract
The invention relates to a method for melting spinning and flexible blowing of fibers and a product thereof, in particular to a melting spinning method of random differential air cooling in spinning forming of clothing fibers and a product thereof. In the method provided by the invention, in the process of the melting spinning, the air speed of the air cooling is controlled by pulse signals to change according to a law that the air speed satisfies an equation V(t)=S+ sin omega t. The invention also provides a fiber, wherein the crimp elasticity recovery rate of the fiber is 85-98%; after being stretched, the fiber is three-dimensionally crimped; under the condition that the total drawing ratio is 1.4-5.5, the final fiber crimp number is 7-15/25mm; and the distribution number of the fiber crimp number in a range of 11-19/25mm is more than 50% of the total distribution ratio of the crimp number. In the invention, the method of air cooling differentiation is adopted at a key area of the melting spinning and cooling forming to ensure that the problem that the forming and the winding of polyamide precursor fibers can be normally carried out while the difference of internal crystal orientation of the fibers as well as the profile degree and the differentiation of the morphological structure of the polyamide fibers can be guaranteed is solved, therefore, the purpose of synthetic fiber simulation is achieved.
Description
Technical field
The present invention relates to method of the flexible blowing of a kind of fibers melt spinning and products thereof, especially relate to a kind of differential at random flexible blasting method of fibers melt spinning of cooling quench in the fibre spinning moulding and products thereof of taking.
Background technology
Imitative naturalization of synthetic fiber is the important means that improve its wearing comfort.Imitative naturalization comprises the regulation and control of MOLECULE DESIGN and physical and mechanical property, morphosis etc.The former research process complexity, the suitability for industrialized production cycle is long, and investment is big.Changing the physical mechanics and the morphosis of synthetic fiber, if press the normal distribution design of natural fabric, is that a kind of operation of regulating aborning is few, and technology is simple, the effective way that cost is low.Application number 200710120117.3 is mentioned among a kind of preparation method of the fibre in differentiation with wool-like effect and to be carried out polyester fiber and how different terylene thread network combined and obtain hiding in the hiding the fibre in differentiation of a large amount of internal stress.Application number is to mention in 201010174972.4 pre-oriented yarn and high boiling water contractile filaments are carried out network combined back and then obtain a kind of fibre in differentiation that approaches wool.Mention in the patent No. 200520001791.6 in the drawing of fiber process using and have the drawing-off cam of convex-concave shape and make the forward degree of fiber different, prepare fibre in differentiation with degree of crystallinity.And the present invention is the differential sequencing control of adopting the cooling air wind speed in the fiber production process, the difference of the degree of crystallinity in the single fiber, the degree of orientation, internal stress or degree of hollowness and prepare differential emulation chemical fibre dimension.
Summary of the invention
The purpose of this invention is to provide method of the flexible blowing of a kind of fibers melt spinning and products thereof, extrude the chemical control system of difference at random of cooling air wind speed under the spinnerets at melt, just regulate the fiber that wind speed is prepared differential condensed state structure and morphosis by pulse pump.Because the cooling air wind speed is according to certain programme-control, cause that the inhomogeneous certain rules that also presents of the internal stress of fiber distributes and causes the differential certain rules that presents of fiber to distribute.This distribution can be complementary with the differential distribution of prepared target natural fabric.The present invention is the key area at the melt spinning cooling forming, adopt air-cooled differential method, solved and to have guaranteed that precursor is shaped, reels and normally carry out, can guarantee the difference of the inherent crystalline orientation of fiber again, structure special-shaped degree of fibre morphology and degree of hollowness differential, thus reach the purpose of synthetic fiber emulationization.
Technical scheme of the present invention is:
The method of the flexible blowing of a kind of fibers melt spinning of the present invention, in the melt spinning process, the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=S+Asin ω t, wherein V (t) is a wind speed, and unit can be m/s; S is a fixed constant, and unit can be m/s; A is the peak swing of pulse signal fluctuation, and unit can be m/s; ω is the pulse signal angular frequency, and unit can be rad/s; T is the blowing burst length, and unit can be s.
As optimized technical scheme:
The method of the flexible blowing of aforesaid a kind of fibers melt spinning, the melt feed of described melt spinning is PET, PA, PP, PE, PLA, PBT or PDT.
The method of the flexible blowing of aforesaid a kind of fibers melt spinning, described fixed constant S mainly is the fixed constant of determining according to the used melt feed kind of spinning, and the pairing S of PET, PA, PP, PE, PLA, PBT and PDT is followed successively by 0.8～1.1,0.6～1.2,0.9～1.3,0.7～1.3,0.8～1.4,0.8～1.1 and 0.8～1.1 respectively.The blowing zone of other conditions in the spinning process such as cooling quench temperature, cooling quench and winding speed etc. also can produce certain influence to the value of fixed constant S, cooling quench temperature particularly, when described fixed constant S is 21 ℃ in the blowing temperature, usually PET, PA, PP, PE, PLA, PBT and the pairing S of PDT are followed successively by 0.95,0.9,1.1 respectively, 1.0,1.1,0.95,0.95; When the every rising of cooling quench temperature or when reducing by 1 ℃, the fixed constant S of PET, PA, PP, PE, PLA, PBT and PDT then increases accordingly or reduces 0.03,0.06,0.04,0.06,0.06,0.03 and 0.03.Described fixed constant S also is subjected to the blowing zone of cooling quench and the influence of winding speed, be specially S and become greatly along with the rising of the increase of blowing zone length and winding speed, otherwise S then diminishes.
The method of the flexible blowing of aforesaid a kind of fibers melt spinning, the peak swing A of described pulse signal determines constant for the kind according to melt feed, and the pairing A of PET, PA, PP, PE, PLA, PBT and PDT is followed successively by 1.0,1.0,0.95,0.95,1.1,1.0 and 1.0 respectively.
The method of the flexible blowing of aforesaid a kind of fibers melt spinning, angular frequency is 60～600 according to the curling number of fiber product in the described pulse signal fluctuation equation; When the fiber crimp number is 11-16/25mm, account for 40%～55% o'clock of crispation number total distributed ratio, ω is 60～400; As 15～19/25mm of crispation number, account for 50～80% o'clock of crispation number total distributed ratio, ω is 150～600.
The method of the flexible blowing of aforesaid a kind of fibers melt spinning, described cooling quench is ring blowing, lateral blowing or center blowing; The blowing zone of described cooling quench is spinnerets below 0～1100mm.
The present invention also provides the prepared fiber of method of the flexible blowing of a kind of fibers melt spinning, the curling elastic recovery rate of described fiber is 85～98%, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, at the total draft multiple is under 3.5～5.5 situations, obtaining final fiber crimp number is 7～35/25mm, and wherein the distribution number of fiber crimp number in 11～19/25mm scope accounts for more than 50% of crispation number total distributed ratio.
Aforesaid a kind of fiber is characterized in that, the filament number of described fiber is 2.0～4.5dtex.
Aforesaid a kind of fiber, described fibre section are circular, hollow or odd-shaped cross section, and described odd-shaped cross section is flat, cross, petal, trilobal, triangle or star.
Aforesaid a kind of fiber, the degree of profile of the fiber of described odd-shaped cross section are 10～70%.
Aforesaid a kind of fiber, the degree of hollowness of the fiber of described hollow section are 6～32%; The fiber of described hollow section is many central hole structures of single fiber single hole concentric structure or eccentric structure or single fiber.
Beneficial effect
1, changes the differential tangible differential synthetic fiber of simulated effect that prepare of spinning cooling forming regional environment by the flexibility blowing, and the differential of flexible blowing miniclimate controlled by computer program, can adopt different computer programs according to the characteristics of the natural chemical fibre dimension of difference.
2, the emulationization of the synthetic fiber of the present invention's preparation need not to adjust existing production process, and technology is simple, and operating cost is low.
The specific embodiment
Below in conjunction with the specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after the content of having read the present invention's instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Embodiment 1
In PET melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+sin60t, and wherein V (t) is a wind speed, and unit is m/s; T is the blowing burst length, and unit is s (down together).26 ℃ of cooling quench temperature, the blowing zone is 0～500mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1500m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 8～25/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 40% of crispation number total distributed ratio, account for 30% less than 11/25mm, greater than 16/25mm account for 30%, 11～19/25mm account for 53%, fibre number is 3.1dtex.The curling elastic recovery rate of described fiber is 85～92%.
Embodiment 2
In PET melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.8+sin200t.16 ℃ of cooling quench temperature, the blowing zone is 0～600mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1400m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 8～25/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 50% of crispation number total distributed ratio, account for 25% less than 11/25mm, greater than 16/25mm account for 25%, 11～19/25mm account for 60%, fibre number is 3.1dtex.The curling elastic recovery rate of described fiber is 85～92%.
Embodiment 3
In PP melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+0.95sin400t.21 ℃ of cooling quench temperature, the blowing zone is 0～800mm, and behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 2000m/min, at the total draft multiple is under 4.5 situations, and obtaining final fiber crimp number is 9～30/25mm, and wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 60% of crispation number total distributed ratio, account for 5% less than 11/25mm, greater than 16/25mm account for 35%, 11～19/25mm account for 75%, the fiber limit is 2.8dtex.The curling elastic recovery rate of described fiber is 85～98%.
Embodiment 4
In PP melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.3+0.95sin400t.26 ℃ of cooling quench temperature, the blowing zone is 0～800mm, and behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 2300m/min, at the total draft multiple is under 4.5 situations, and obtaining final fiber crimp number is 9～30/25mm, and wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 60% of crispation number total distributed ratio, account for 5% less than 11/25mm, greater than 16/25mm account for 35%, 11～19/25mm account for 75%, the fiber limit is 2.8dtex.The curling elastic recovery rate of described fiber is 86～97%.
Embodiment 5
In PP melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.95+0.95sin400t.16 ℃ of cooling quench temperature, the blowing zone is 0～900mm, and behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 2300m/min, at the total draft multiple is under 4.5 situations, and obtaining final fiber crimp number is 1～30/25mm, and wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 60% of crispation number total distributed ratio, account for 5% less than 11/25mm, greater than 16/25mm account for 36%, 11～19/25mm account for 74%, the fiber limit is 2.8dtex.The curling elastic recovery rate of described fiber is 85～96%.
Embodiment 6
In PBT melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.95+sin150t.21 ℃ of cooling quench temperature, the blowing zone is 0～600mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1700m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 7～28/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 55% of crispation number total distributed ratio, account for 25% less than 11/25mm, greater than 16/25mm account for 20%, 11～19/25mm account for 66%, the fiber limit is 3.2dtex.The curling elastic recovery rate of described fiber is 85～92%.
Embodiment 7
In PBT melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.07+sin300t.25 ℃ of cooling quench temperature, the blowing zone is 0～500mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1600m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 7～28/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 65% of crispation number total distributed ratio, account for 15% less than 15/25mm, greater than 19/25mm account for 20%, 11～19/25mm account for 75%, the fiber limit is 3.2dtex.The curling elastic recovery rate of described fiber is 85～92%.
Embodiment 8
In PBT melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+sin150t.26 ℃ of cooling quench temperature, the blowing zone is 0～1000mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1600m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 7～28/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 55% of crispation number total distributed ratio, account for 25% less than 11/25mm, greater than 16/25mm account for 20%, 11～19/25mm account for 66%, the fiber limit is 3.2dtex.The curling elastic recovery rate of described fiber is 85～92%.
Embodiment 9
In PBT melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.8+1.0sin300t.16 ℃ of cooling quench temperature, the blowing zone is 0～500mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1500m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 7～28/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 66% of crispation number total distributed ratio, account for 16% less than 15/25mm, greater than 19/25mm account for 19%, 11～19/25mm account for 75%, the fiber limit is 3.2dtex.The curling elastic recovery rate of described fiber is 85～90%.
Embodiment 10
In PA melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.9+sin600t.21 ℃ of cooling quench temperature, the blowing zone is 0～900mm, and behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1700m/min, at the total draft multiple is under 5.5 situations, and obtaining final fiber crimp number is 9～35/25mm, and wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 80% of crispation number total distributed ratio, account for 5% less than 15/25mm, greater than 19/25mm account for 15%, 11～19/25mm account for 86%, the fiber limit is 2.4dtex.The curling elastic recovery rate of described fiber is 90～97%.
Embodiment 11
In PA melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.2+sin600t.26 ℃ of cooling quench temperature, the blowing zone is 0～900mm, and behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1900m/min, at the total draft multiple is under 5.5 situations, and obtaining final fiber crimp number is 9～35/25mm, and wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 80% of crispation number total distributed ratio, account for 4% less than 15/25mm, greater than 19/25mm account for 16%, 11～19/25mm account for 86%, the fiber limit is 2.3dtex.The curling elastic recovery rate of described fiber is 89～96%.
Embodiment 12
In PA melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.6+sin500t.16 ℃ of cooling quench temperature, the blowing zone is 0～900mm, and behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1200m/min, at the total draft multiple is under 5.5 situations, and obtaining final fiber crimp number is 9～35/25mm, and wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 80% of crispation number total distributed ratio, account for 5% less than 15/25mm, greater than 19/25mm account for 14%, 11～19/25mm account for 85%, the fiber limit is 2.5dtex.The curling elastic recovery rate of described fiber is 90～96%.
Embodiment 13
In PA melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.9+sin500t.21 ℃ of cooling quench temperature, the blowing zone is 0～100mm, and behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1200m/min, at the total draft multiple is under 5.2 situations, and obtaining final fiber crimp number is 9～35/25mm, and wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 80% of crispation number total distributed ratio, account for 5% less than 15/25mm, greater than 19/25mm account for 14%, 11～19/25mm account for 85%, the fiber limit is 2.5dtex.The curling elastic recovery rate of described fiber is 89～97%.
Embodiment 14
In PLA melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+1.1sin500t.21 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1600m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 12～30/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 50% of crispation number total distributed ratio, account for 25% less than 15/25mm, greater than 19/25mm account for 25%, 11～19/25mm account for 65%, the fiber limit is 4.5dtex.The curling elastic recovery rate of described fiber is 90～98%.
Embodiment 15
In PLA melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.8+1.1sin450t.16 ℃ of cooling quench temperature, the blowing zone is 0～1000mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1500m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 12～30/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 50% of crispation number total distributed ratio, account for 26% less than 15/25mm, greater than 19/25mm account for 25%, 11～19/25mm account for 64%, the fiber limit is 4.4dtex.The curling elastic recovery rate of described fiber is 92～98%.
Embodiment 16
In PLA melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.4+1.1sin490t.26 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1600m/min, at the total draft multiple is under 3.5 situations, obtaining final fiber crimp number is 12～30/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 50% of crispation number total distributed ratio, account for 21% less than 15/25mm, greater than 19/25mm account for 26%, 11～19/25mm account for 63%, the fiber limit is 4.5dtex.The curling elastic recovery rate of described fiber is 90～96%.
Embodiment 17
In PDT melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.95+sin400t.21 ℃ of cooling quench temperature, the blowing zone is 0～1000mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1500m/min, be under 4.2 the situation at the total draft multiple, obtaining final fiber crimp number is 8～32/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 55% of crispation number total distributed ratio, account for 25% less than 11/25mm, greater than 16/25mm account for 20%, 11～19/25mm account for 73%, the fiber limit is 4.1dtex.The curling elastic recovery rate of described fiber is 89～92%.
Embodiment 18
In PDT melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.95+sin450t.16 ℃ of cooling quench temperature, the blowing zone is 0～900mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1300m/min, be under 4 the situation at the total draft multiple, obtaining final fiber crimp number is 8～32/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 55% of crispation number total distributed ratio, account for 25% less than 11/25mm, greater than 16/25mm account for 20%, 11～19/25mm account for 69%, the fiber limit is 4.2dtex.The curling elastic recovery rate of described fiber is 89～92%.
Embodiment 19
In PDT melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+sin550t.26 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1200m/min, be under 4 the situation at the total draft multiple, obtaining final fiber crimp number is 8～32/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 55% of crispation number total distributed ratio, account for 25% less than 11/25mm, greater than 16/25mm account for 20%, 11～19/25mm account for 74%, the fiber limit is 4.2dtex.The curling elastic recovery rate of described fiber is 89～92%.
Embodiment 20
In PE melt spinning process, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.3+0.95sin200t.26 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1580m/min, be under 5.5 the situation at the total draft multiple, obtaining final fiber crimp number is 12～32/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 65% of crispation number total distributed ratio, account for 10% less than 15/25mm, greater than 19/25mm account for 25%, 11～19/25mm account for 75%, the fiber limit is 2.8dtex.The curling elastic recovery rate of described fiber is 88～93%.
Embodiment 21
Prepare in the doughnut process at the PE melt spinning, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1+0.95sin300t.21 ℃ of cooling quench temperature, the blowing zone is 0～1300mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1720m/min, be under 5.2 the situation at the total draft multiple, obtaining final hollowness of fibre is 6%, crispation number is 10～28/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 75% of crispation number total distributed ratio, less than 15/25mm account for 5%, account for 20% greater than 19/25mm, 11～19/25mm accounts for 87%, and the fiber limit is 2.0dtex.The curling elastic recovery rate of described fiber is 88～92%.
Embodiment 22
Prepare in the doughnut process at the PE melt spinning, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.7+0.95sin430t.16 ℃ of cooling quench temperature, the blowing zone is 0～1000mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1720m/min, be under 5.0 the situation at the total draft multiple, obtaining final hollowness of fibre is 6%, crispation number is 10～28/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 75% of crispation number total distributed ratio, less than 15/25mm account for 5%, account for 20% greater than 19/25mm, 11～19/25mm accounts for 87%, and the fiber limit is 2.0dtex.The curling elastic recovery rate of described fiber is 88～92%.
Embodiment 23
Prepare in the doughnut process at the PP melt spinning, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+0.95sin400t.21 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1600m/min, be under 3 the situation at the total draft multiple, obtaining final hollowness of fibre is 32～70%, crispation number is 7～29/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 60% of crispation number total distributed ratio, less than 11/25mm account for 15%, account for 25% greater than 16/25mm, 11～19/25mm accounts for 72%, and the fiber limit is 2.3dtex.The curling elastic recovery rate of described fiber is 89～95%.
Embodiment 24
Prepare in the doughnut process at the PET melt spinning, adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+0.95sin500t.21 ℃ of cooling quench temperature, the blowing zone is 20～1000mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1500m/min, be under 3.2 the situation at the total draft multiple, obtaining final hollowness of fibre is 70%, crispation number is 9～29/25mm, wherein the distribution number of fiber crimp number in 11～16/25mm scope accounts for 65% of crispation number total distributed ratio, less than 11/25mm account for 10%, account for 25% greater than 16/25mm, 11～19/25mm accounts for 81%, and the fiber limit is 2.0dtex.The curling elastic recovery rate of described fiber is 92～96%.
Embodiment 25
Prepare in the profiled filament process at the PET melt spinning, wherein profiled fibre cross-section is a pancake.Adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=0.95+sin400t.21 ℃ of cooling quench temperature, the blowing zone is 0～800mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1700m/min, be under 4 the situation at the total draft multiple, obtaining final hollowness of fibre is 32%, the fiber degree of profile is 20～60%, and crispation number is 10～33/25mm, and wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 75% of crispation number total distributed ratio, account for 5% less than 15/25mm, greater than 19/25mm account for 20%, 11～19/25mm account for 85%, the fiber limit is 2.4dtex.The curling elastic recovery rate of described fiber is 90～95%.
Embodiment 26
Prepare in the profiled filament process at the PP melt spinning, wherein profiled fibre cross-section is a cross.Adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+0.95sin500t.21 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1700m/min, be under 5 the situation at the total draft multiple, obtaining final fiber degree of profile is 30～70%, crispation number is 9～35/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 70% of crispation number total distributed ratio, less than 15/25mm account for 10%, account for 20% greater than 19/25mm, 11～19/25mm accounts for 85%, and the fiber limit is 2.4dtex.The curling elastic recovery rate of described fiber is 85～98%.
Embodiment 27
Prepare in the profiled filament process at the PET melt spinning, wherein profiled fibre cross-section is petal.Adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+0.95sin600t.21 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1700m/min, be under 4.5 the situation at the total draft multiple, obtaining final fiber degree of profile is 10-65%, crispation number is 13～35/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 75% of crispation number total distributed ratio, less than 15/25mm account for 5%, account for 20% greater than 19/25mm, 11～19/25mm accounts for 85%, and the fiber limit is 2.8dtex.The curling elastic recovery rate of described fiber is 85～98%.
Embodiment 28
Prepare in the profiled filament process at the PET melt spinning, wherein profiled fibre cross-section is a trilobal.Adopt flexible blasting method, wherein the wind speed of cooling quench is changed by rule by pulse signal control, and described rule is meant that described wind speed satisfies equation V (t)=1.1+0.95sin500t.21 ℃ of cooling quench temperature, the blowing zone is 0～1100mm, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, winding speed is 1700m/min, be under 4.5 the situation at the total draft multiple, obtaining final fiber degree of profile is 40-70%, crispation number is 12～35/25mm, wherein the distribution number of fiber crimp number in 15～19/25mm scope accounts for 70% of crispation number total distributed ratio, less than 15/25mm account for 10%, account for 20% greater than 19/25mm, 11～19/25mm accounts for 83%, and the fiber limit is 2.9dtex.The curling elastic recovery rate of described fiber is 85～90%.
Claims (10)
1. the method for the flexible blowing of a fibers melt spinning, it is characterized in that: in the melt spinning process, the wind speed of cooling quench is changed by rule by pulse signal control, described rule is meant that described wind speed satisfies wave equation V (t)=S+Asin ω t, wherein V (t) is a wind speed, and S is a fixed constant, and A is the peak swing of pulse signal fluctuation, ω is the pulse signal angular frequency, and t is the blowing burst length.
2. the method for the flexible blowing of a kind of fibers melt spinning according to claim 1 is characterized in that the melt feed of described melt spinning is PET, PA, PP, PE, PLA, PBT or PDT.
3. the method for the flexible blowing of a kind of fibers melt spinning according to claim 1, it is characterized in that, described fixed constant S mainly is the fixed constant of determining according to the used melt feed kind of spinning, and the pairing S of PET, PA, PP, PE, PLA, PBT and PDT is followed successively by 0.8～1.1,0.6～1.2,0.9～1.3,0.7～1.3,0.8～1.4,0.8～1.1 and 0.8～1.1 respectively.
4. the method for the flexible blowing of a kind of fibers melt spinning according to claim 1, it is characterized in that, the peak swing A of described pulse signal determines constant for the kind according to melt feed, and the pairing A of PET, PA, PP, PE, PLA, PBT and PDT is followed successively by 1.0,1.0,0.95,0.95,1.1,1.0 and 1.0 respectively.
5. the method for the flexible blowing of a kind of fibers melt spinning according to claim 1 is characterized in that, angular frequency is 60～600 according to the curling number of fiber product in the described pulse signal fluctuation equation; When the fiber crimp number is 11-16/25mm, account for 40%～55% o'clock of crispation number total distributed ratio, ω is 60～400; As 15～19/25mm of crispation number, account for 50～80% o'clock of crispation number total distributed ratio, ω is 250～600.
6. the method for the flexible blowing of a kind of fibers melt spinning according to claim 1 is characterized in that, described cooling quench is ring blowing, lateral blowing or center blowing; The blowing zone of described cooling quench is spinnerets below 0～1100mm.
7. the prepared fiber of method of the flexible blowing of a kind of fibers melt spinning as claimed in claim 1, it is characterized in that: the curling elastic recovery rate of described fiber is 85～98%, behind the as-spun fibre drawn, fiber presents three-dimensional crimp, at the total draft multiple is under 3.5～5.5 situations, obtaining final fiber crimp number is 7～35/25mm, and wherein the distribution number of fiber crimp number in 11～19/25mm scope accounts for more than 50% of crispation number total distributed ratio.
8. a kind of fiber according to claim 7 is characterized in that, the filament number of described fiber is 2.0～4.5dtex.
9. a kind of fiber according to claim 7 is characterized in that, described fibre section is circular, hollow or odd-shaped cross section, and described odd-shaped cross section is flat, cross, petal, trilobal, triangle or star; The degree of profile of the fiber of described odd-shaped cross section is 10～70%.
10. a kind of fiber according to claim 9 is characterized in that, the degree of hollowness of the fiber of described hollow section is 6～32%; The fiber of described hollow section is many central hole structures of single fiber single hole concentric structure or eccentric structure or single fiber.
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