CN108239793A - A kind of hollow long fibre of polyamide - Google Patents

A kind of hollow long fibre of polyamide Download PDF

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Publication number
CN108239793A
CN108239793A CN201611205157.3A CN201611205157A CN108239793A CN 108239793 A CN108239793 A CN 108239793A CN 201611205157 A CN201611205157 A CN 201611205157A CN 108239793 A CN108239793 A CN 108239793A
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hollow
fluffy
polyamide
fiber
fibre
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Inventor
倪春健
吉宫隆之
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Toray Fibers and Textiles Research Laboratories China Co Ltd
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Toray Fibers and Textiles Research Laboratories China Co Ltd
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Priority to CN201611205157.3A priority Critical patent/CN108239793A/en
Publication of CN108239793A publication Critical patent/CN108239793A/en
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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F6/00—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof
    • D01F6/58—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products
    • D01F6/60—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from homopolycondensation products from polyamides
    • D—TEXTILES; PAPER
    • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
    • D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
    • D02G1/00—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Artificial Filaments (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

The invention discloses a kind of hollow long fibre of polyamide, cross section degree of hollowness is 20%~45%, and the long fibre is the curly form of 3 D stereo in its natural state, and the radius of curvature of curly form is 10mm~50mm.The bulkiness processed filament processed using the hollow long fibre of the polyamide, fluffy degree is high, soft, is suitble to be used as the long cotton of filling.

Description

A kind of hollow long fibre of polyamide
Technical field
The present invention relates to a kind of polyamide long fibre of hollow, crimped shape, suitable for making filling with long cotton.
Background technology
Usually by the feather natural feather of palmipeds in textile industry, such as goose down, duck's down etc. are filled in eiderdown quilt, sleeping bag and each In the product of kind warming.The bird flu occurred in world wide causes the yield of natural feather drastically to decline, so as to cause price Rise.To the safety of natural feather there is also doubt, natural feather can cause to dislike consumer if washing is insufficient simultaneously It is smelly, it is therefore desirable to the dirt for leading to stench be removed in advance, keep the cleanliness factor of feather.And duvet, feather jacket etc. The problem of product are also there is being difficult to wash is filled and presented in feather.
For this purpose, insider, which is dedicated to research and utilization synthetic fibers, replaces filling animal natural feather.Chinese patent CN186187A discloses a kind of down-like cotton of staple fiber type, but the fluffy degree of staple fiber filling cotton is not high, the heat preservation made There are granular sensation during the touch of material, while easily shift during the washing of staple fiber type down-like cotton.Therefore, there is an urgent need to open Packing material that send out a kind of novel replaces natural feather.Fypro is easy to produce while has the advantages that cheap, exploitation Polyamide-based packing material has good market prospects.
Invention content
The purpose of the present invention is to provide a kind of hollow long fibres of polyamide of curly form with 3 D stereo, are applicable in It is filled in making with long cotton.
The hollow long fibre of polyamide of the present invention, the degree of hollowness of cross section is 20%~45%, and the polyamide is hollow long fine Dimension is the curly form of 3 D stereo in its natural state, and the radius of curvature of curly form is 10mm~50mm.
The hollow long fibre of polyamide of the present invention, filament number is preferably 4.0dtex~15.0dtex, more preferably 5.0dtex~10.0dtex.
The hollow long fibre of polyamide of the present invention is still the curling of 3 D stereo after 160 DEG C × 3min dry heat treatments Shape, and the crimp radius of rolled state is 3.5mm~10mm.
The hollow long fibre of polyamide of the present invention, polymer raw material are nylon 6, nylon66 fiber, nylon 11, nylon 12, Buddhist nun Dragon 610, nylon 612, nylon 1010 or theirs is polymer-modified.
The hollow long fibre of polyamide of invention is made by the technique of melt spinning, is had and is produced simple, at low cost, tool There is 3 D stereo coiled structure, suitable for being processed into fluffy silk processed filament.
Description of the drawings
Fig. 1 is the hollow long stapled triangular hollow cross-sectional shape figure of polyamide.
Fig. 2 is the hollow long stapled quadrangle hollow cross sectional shape figure of polyamide.
Fig. 3 is the curly form figure of the 3 D stereo of the hollow long fibre of polyamide in its natural state.
Specific embodiment
In order to develop a kind of filler that can substitute natural feather, it is suitble to be processed into fluffy processed filament the present invention provides one kind The hollow long fibre of polyamide.Since the doughnut has the structure feature of 3 D stereo, the fluffy processed filament of gained is processed Sheath fiber also there is 3-D solid structure, therefore the excluded volume of fluffy silk is with regard to big, can obtain excellent fluffy of bulkiness plus Work silk.
The polyamide doughnut of the present invention is by doughnut made from melt spinning technology.The polyamide of melting is cut Piece is spued by Special hollow spinneret, is then batched after side-blown air cooling obtained.During melt spinning by adjusting The conditions such as the position change cooling distance of cross air blasting, the wind speed of cross air blasting, spinning speed control the degree of hollowness of doughnut to exist In the range of 20%~45%, while in the range of curl characteristics 10mm~50mm.The doughnut of identical fibre diameter and middle real fiber It compares, degree of hollowness is higher, and light weight sense is more apparent.Fluffy degree simultaneously using the fibrous fluffy processed filament of high degree of hollowness is higher. If the radius of curvature of the doughnut is too small, the coherent between fibre single thread is high, the fiber in fluffy silk process Fibrillation is not easy, and the diameter of annulus that fiber is formed is less than normal, influences the bulkiness of processed filament；Conversely, the curling of sheath fiber Too greatly, the fibroplastic circle diameter of sheath is excessive after being processed into fluffy processed filament, can weaken or can not embody sheath for radius The three-dimensional stereo effect of fiber script can also influence the bulkiness of processed filament
According to hollow spinneret plate discharge hole shape, the change of the difference and production technology of arrangement, obtained doughnut Section is also slightly different, and the shape of hollow space has circle, subtriangular, approximating square, the differences such as approximate pentagon Shape, while the empty number on hollow section is not only limited in a hole.
Filament number degree ranging from 4.0dtex~15.0dtex of the hollow Fypro of the present invention adds as fluffy The raw fibre of work silk, fibre single thread fiber number is higher, and the rigidity of fiber is better, and the fluffy degree of manufactured fluffy silk can be better, Resistance to pressure, recovery also can be better simultaneously.But if monfil diameter is excessively thick, cooling and fiber is uniform during spinning Property declined, while manufactured fluffy silk feel can be partially hard.So more preferably ranging from 5.0dtex~10.0dtex.
The raw material of the hollow Fypro of the present invention is mainly common polyamide, such as nylon 6, nylon66 fiber, nylon 11st, nylon 12, nylon 610, nylon 612, nylon 1010 or theirs is polymer-modified.It is special in order to assign fluffy processed filament Function, the polymer of above-mentioned modification, such as polymer etc. that antibiosis anti-acarien is modified can also be used, in fluffy aspect of performance There is same effect.
Hollow polyester long fibre can be that direct N roots merge as filling one of raw material of fluffy processing tow is made Fluffy processing tow is formed to be directly used as filling long cotton or with other raw materials merging using, such as can be with fusing point Combined yarn is made in slightly lower fiber, is then used as filling long cotton；Or further combined yarn is grown again with hollow polyester fine Dimension carries out the compound part that carries out again of core sheath and melts the obtained superior fluffy processing tow of processing, is then used as filling long cotton.
Long fibre polyamide doughnut of the present invention can be prepared via a method which to obtain, but be not limited to the party Method：
Base polyamide slice is dried first so that the moisture content of polyamide slice reduces, and improves spinnability, according to amide It is sliced type difference and controls dried moisture rate in 100ppm~1000ppm.Dried slice is spun by general melting The mode of silk carries out spinning.By piping mode of entrance babinet after screw rod or hot plate melt slice, by metering pump Melt polymers enter filament spinning component after accurate measurement, and the spinneret used in filament spinning component is dedicated for hollow fiber spinning Spinneret.From spinneret spue polymer through supercooling, oil after batched.There is the hollow fibre of micro- curling in order to obtain It ties up, to cooling distance in spinning process（Spinneret lower edge is to the cooling distance of cross air blasting upper edge）Have compared with strict requirements, one As control in the range of 10mm~150mm, in the range of preferred scope 20mm~100mm.While in order to make doughnut both sides Construction forms difference, and the wind speed of cross air blasting is also what is required, according to fiber species（Total fiber number and monofilament number）Difference is general to control System is in the range of 30m/min~90m/min.Cause when cooling down difference physical property different between monofilament in order to prevent, spinneret Preferably ' plover ' arrangement of the arrangement mode in discharge hole, namely what is often called diamond array.This spinning technique mainly uses single step spining Technique, i.e. spinning/stretching are completed simultaneously, that is, the FDY being commonly called as.
Polyamide doughnut of the present invention has three-dimensional crimp structure, while fiber is thicker, with the hollow fibre Fluffy processed filament, which is made, in dimension has high excluded volume and with high fluffy degree, while has excellent compression resistant characteristic.
Test method of the present invention is as follows：
（1）The test method of total fiber number and filament number
The test of total fiber number is according to JIS L 1013:2010 standard testings, filament number be by total fiber number and monofilament number come into Row calculates.
（2）Hollow rate
Hollow long fibre is cut off into flakiness (i.e. fiber cross section) along longitudinal direction, it is suitable to be amplified under ordinary optical microscope Multiplying power is taken pictures, and the area S of hollow space is calculated according to photo1With the area S of fiber entirety2(including hollow portion), then It calculates：
Hollow rate=（S1/S2）×100%.
（3）Radius of curvature test method
The radius of curvature of nature：By sample to be tested in constant-temperature constant-humidity environment（20℃×65%RH）Placing 8h or more makes Its is in stable condition（Such as Fig. 3）, then choose bending part and carry out radius measurement, choose after 20 different places measure and be averaged. The data obtained is radius of curvature.
Radius of curvature after dry heat treatment processing：Yarn is passed through into dipping machine（Fiber number, which measures, to be used）Sample curling 10 is enclosed, so After be put into drying machine and be heat-treated, treatment conditions are 160 DEG C × 3min, and sample then is placed 4h in constant-temperature constant-humidity environment More than, it finally chooses bending part and carries out radius measurement, choose after 20 different places measure and be averaged.The data obtained is song Rate radius.
（4）Fluffy degree
It is tested according to IDFB methods：
It is debugged 8 hours or 8 hours or more 1. sample to be tested is placed in the environment of 20 DEG C × 65%RH first so as to be tested Sample is stablized；
2. weighing sample 30g, put it into measurement bucket and close the lid after being shaken soft fluffy state manually；
3. weight disk to be moved downward to the peak of contact sample, then decontroling weight disk makes its free-falling, decontrols weight Timing while disk reads height and records after stablizing 1 minute；
4. opening lid takes out sample, shaken again to soft fluffy state, be put into measurement bucket and close the lid, according to step 3. It measures again, same method is tested 5 times；
5. by the way that fluffy degree is calculated after calculating the average height of 5 times.
Illustrate present disclosure by the following examples, but the invention is not limited in contents listed by embodiment.
Embodiment 1：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 25m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 300T-20f, and hollow section is hollow for triangle, degree of hollowness 20.0%, filament number 15.0dtex, before heat treatment Radius of curvature is 50.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 10.0mm.The fiber is selected as sheath The raw material of fiber and core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core sheath The fluffy silk of type, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 380inch3/30g。 Specifically it is shown in Table 1.
Embodiment 2：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 40m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 150T-10f, and hollow section is hollow for triangle, degree of hollowness 30.0%, filament number 15.0dtex, before heat treatment Radius of curvature is 42.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 8.5mm.The fiber is selected as sheath The raw material of fiber and core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core sheath The fluffy silk of type, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 590inch3/30g。 Specifically it is shown in Table 1.
Embodiment 3：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 40m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 60T-6f, and hollow section is hollow for triangle, degree of hollowness 45.0%, filament number 10.0dtex, the song before heat treatment Rate radius is 37.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 7.0mm.The fiber is selected as sheath fibre The raw material of peacekeeping core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core-sheath-type Fluffy silk, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 790inch3/30g.Tool Body is shown in Table 1.
Embodiment 4：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 35m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 100T-10f, and hollow section is hollow for triangle, degree of hollowness 30.0%, filament number 10.0dtex, before heat treatment Radius of curvature is 40.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 7.8mm.The fiber is selected as sheath The raw material of fiber and core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core sheath The fluffy silk of type, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 640inch3/30g。 Specifically it is shown in Table 1.
Embodiment 5：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 50m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 100T-20f, and hollow section is hollow for triangle, degree of hollowness 30.0%, filament number 5.0dtex, before heat treatment Radius of curvature is 35.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 6.5mm.The fiber is selected as sheath The raw material of fiber and core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core sheath The fluffy silk of type, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 600inch3/30g。 Specifically it is shown in Table 1.
Embodiment 6：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 75m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 60T-15f, and hollow section is hollow for triangle, degree of hollowness 45.0%, filament number 4.0dtex, the song before heat treatment Rate radius is 10.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 3.5mm.The fiber is selected as sheath fibre The raw material of peacekeeping core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core-sheath-type Fluffy silk, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 470inch3/30g.Tool Body is shown in Table 2.
Embodiment 7：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 70m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 65T-10f, and hollow section is hollow for triangle, degree of hollowness 30.0%, filament number 6.5dtex, the song before heat treatment Rate radius is 30.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 6.0mm.The fiber is selected as sheath fibre The raw material of peacekeeping core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core-sheath-type Fluffy silk, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 570inch3/30g.Tool Body is shown in Table 2.
Embodiment 8：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 70m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 50T-10f, and hollow section is hollow for triangle, degree of hollowness 30.0%, filament number 5.0dtex, the song before heat treatment Rate radius is 20.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 4.5mm.The fiber is selected as sheath fibre The raw material of peacekeeping core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core-sheath-type Fluffy silk, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 510inch3/30g.Tool Body is shown in Table 2.
Embodiment 9：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 25m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 60T-6f, and hollow section is hollow for quadrangle, degree of hollowness 45.0%, filament number 15.0dtex, the song before heat treatment Rate radius is 42.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 8.1mm.The fiber is selected as sheath fibre The raw material of peacekeeping core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core-sheath-type Fluffy silk, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 750inch3/30g.Tool Body is shown in Table 2.
Embodiment 10：
Raw material uses polyamide 66, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 35m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 100T-10f, and hollow section is hollow for triangle, degree of hollowness 30.0%, filament number 10.0dtex, before heat treatment Radius of curvature is 38.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 7.5mm.The fiber is selected as sheath The raw material of fiber and core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core sheath The fluffy silk of type, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 620inch3/30g。 Specifically it is shown in Table 2.
Embodiment 11：
Raw material uses polyamide 610, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, cross air blasting Wind speed for 35m/min, hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：Fiber Kind is 100T-10f, and hollow section is hollow for triangle, degree of hollowness 30%, filament number 10.0dtex, the song before heat treatment Rate radius is 36.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatments is 7.0mm.The fiber is selected as sheath fibre The raw material of peacekeeping core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core-sheath-type Fluffy silk, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 590inch3/30g.Tool Body is shown in Table 3.
Embodiment 12：
Raw material uses polyamide 1010, which is dried by swinging vacuum drier, moisture rate after drying For 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, by metering pump accurate measurement Polymer afterwards is delivered to filament spinning component, and the spinneret of filament spinning component is hollow special spinning jet, and but distance is 65mm to heat, side-blown The wind speed of wind is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows：It is fine Dimension kind is 100T-10f, and hollow section is hollow for triangle, degree of hollowness 33.0%, filament number 10.0dtex, before heat treatment Radius of curvature for 33.0mm, the radius of curvature after 160 DEG C × 3min dry heat treatments is 6.4mm.Select the fiber conduct The raw material of sheath fiber and core fibre is fed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed, is processed into core The fluffy silk of sheath, and 6 plying obtain bulkiness processing tow, and the fluffy degree for testing fluffy processing tow is 600inch3/ 30g.Specifically it is shown in Table 3.
Comparative example 1：
Raw material uses polyamide 6, which is dried by swinging vacuum drier, and moisture rate is after drying 200ppm.Dried slice through piping after screw rod melt extruded by being transported to metering pump, after metering pump accurate measurement Polymer be delivered to filament spinning component, the spinneret of filament spinning component is common circular hole spinneret, and but distance is 65mm to heat, cross air blasting Wind speed for 25m/min, polyester fiber is made after DSD high-speed spinning process.The characteristic of fiber is as follows：Fiber species are 56T-24f, section are solid circles, filament number 2.3dtex, all without curl characteristics before and after heat treatment.Select the fiber It as sheath fiber and the raw material of core fibre, is fed, is processed as 20 times of overfeeding using sheath silk feeding speed/core filaments feeding speed Into the fluffy silk of core-sheath-type, and 6 plying, bulkiness processing tow is obtained, the fluffy degree for testing fluffy processing tow is 230inch3/30g.Specifically it is shown in Table 3.
Table 1
Table 2
Table 3

Claims (5)

1. a kind of hollow long fibre of polyamide, it is characterised in that：The long stapled cross section degree of hollowness is 20%~45%, described Long fibre is the curly form of 3 D stereo in its natural state, and the radius of curvature of curly form is 10mm~50mm.
2. the hollow long fibre of polyamide according to claim 1, it is characterised in that：The long stapled filament number is 4.0dtex~15.0dtex.
3. the hollow long fibre of polyamide according to claim 2, it is characterised in that：The long stapled filament number is 5.0dtex~10.0dtex.
4. the hollow long fibre of polyamide according to claim 1 or 2, it is characterised in that：The long fibre by 160 DEG C × It is still crimped after 3min dry heat treatments as 3 D stereo shape, and the crimp radius of rolled state is 3.5mm~10mm.
5. the hollow long fibre of polyamide according to claim 1 or 2, it is characterised in that：The polyamide is nylon 6, Buddhist nun Dragon 66, nylon 11, nylon 12, nylon 610, nylon 612, nylon 1010 or theirs is polymer-modified.
CN201611205157.3A 2016-12-23 2016-12-23 A kind of hollow long fibre of polyamide Pending CN108239793A (en)

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Application publication date: 20180703