CN109844189A - Hollow long fibre of polyester and preparation method thereof - Google Patents
Hollow long fibre of polyester and preparation method thereof Download PDFInfo
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- CN109844189A CN109844189A CN201780065153.6A CN201780065153A CN109844189A CN 109844189 A CN109844189 A CN 109844189A CN 201780065153 A CN201780065153 A CN 201780065153A CN 109844189 A CN109844189 A CN 109844189A
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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
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D10/00—Physical treatment of artificial filaments or the like during manufacture, i.e. during a continuous production process before the filaments have been collected
- D01D10/02—Heat treatment
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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
- D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor
-
- 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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- 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
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/22—Yarns or threads characterised by constructional features, e.g. blending, filament/fibre
- D02G3/24—Bulked yarns or threads, e.g. formed from staple fibre components with different relaxation characteristics
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- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2331/00—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products
- D10B2331/04—Fibres made from polymers obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. polycondensation products polyesters, e.g. polyethylene terephthalate [PET]
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2505/00—Industrial
- D10B2505/06—Packings, gaskets, seals
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
- Artificial Filaments (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Multicomponent Fibers (AREA)
Abstract
A kind of hollow long fibre of polyester, cross section degree of hollowness are 20.0%~45.0%, 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 10.0mm~50.0mm.The fluffy processing tow processed using the hollow long fibre of polyester, fluffy degree are high.
Description
The present invention relates to polyester long fibre of a kind of hollow, crimped shape and preparation method thereof, which is suitable for production filling with long cotton.
Usually feather natural feather, such as goose down, duck's down of palmipeds etc. are filled in the product of eiderdown quilt, sleeping bag and various warmings in textile industry.The bird flu occurred in world wide causes the yield of natural feather sharply to decline, so as to cause the rise of price.Consumer is to the safety of natural feather there is also doubt simultaneously, and natural feather will lead to stench if washing is insufficient, it is therefore desirable to which the dirt that will lead to stench in advance removes, and keeps the cleanliness of feather.And it in the feathers such as duvet, feather jacket fills and presents product there is also be difficult to the problem of washing.
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, and there are granular sensations when the thermal insulation material being made into touches, while being easy to happen offset when the washing of staple fiber type down-like cotton.Therefore, there is an urgent need to develop a kind of novel packing materials to replace natural feather.Polyester fiber is easy to produce while having the advantages that cheap, and the packing material for developing Polyester has good market prospects.
Summary of the invention
The purpose of the present invention is to provide a kind of hollow long fibres of polyester of curly form with 3 D stereo, are suitable for production filling long cotton and the hollow long stapled preparation method of the polyester.
The hollow long fibre of polyester of the invention, the degree of hollowness of cross section are 20.0%~45.0%, and the hollow long fibre of the polyester is the curly form of 3 D stereo in its natural state, and the radius of curvature of curly form is 10.0mm~50.0mm.
The hollow long fibre of polyester of the invention, filament number are preferably 4.0dtex~15.0dtex, more preferably 5.0dtex~10.0dtex.
The hollow long fibre of polyester of the invention is still the curly form of 3 D stereo after 160 DEG C × 3min dry heat treatment, and the radius of curvature of rolled state is 3.5mm~10.0mm.
The hollow long fibre of polyester of the invention, polymer raw material is polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate (PBT) or theirs is polymer-modified.
The invention also discloses a kind of hollow long fine micro- preparation methods of above-mentioned polyester, by the slice after drying by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow spinneret plate, cooling distance is 10~150mm, the wind speed of cross air blasting is 25~
90m/min。
The cooling distance preferably 60~110mm；The wind speed of the cross air blasting is 30~50m/min.
The hollow long fibre of the polyester of invention is made by the technique of melt spinning, has the advantage simple, at low cost that produces, and the coiled structure with 3 D stereo, suitable for be processed into can be used as filling long cotton carry out using fluffy processing tow.
Fig. 1 is the hollow long stapled triangular hollow cross-sectional shape figure of polyester.
Fig. 2 is the hollow long stapled quadrangle hollow cross sectional shape figure of polyester.
Fig. 3 is the curly form figure of the 3 D stereo of the hollow long fibre of polyester in its natural state.
Fig. 4 is the instrumentation plan of radius of curvature.
In order to develop a kind of filler that can substitute natural feather, the present invention provides a kind of hollow long fibres of polyester for being suitble to be processed into fluffy processing tow.Since the doughnut has the structure feature of the curly form of 3 D stereo, processing resulting fluffy processing tow also has three-dimensional structure, therefore the excluded volume of fluffy tow can obtain the excellent fluffy processing tow of bulkiness with regard to big.Can in fine polymer, the Young's modulus of polyester fiber in contrast but belong to it is high, so fluffy processing tow obtained is with good resistance to pressure and recovery.
The curly form of the 3 D stereo refers to that fiber is rendered as irregular helical structure (Fig. 3) on length direction, simultaneously as leading to rotation mode between monofilament there are the difference of orientation between a part of monofilament, direction is different and forms various dimensions solid shape.
The hollow long fibre of polyester of the invention is the doughnut as made from melt spinning technology.The polyester slice of melting is spued by Special hollow spinneret, is then batched after side-blown air cooling obtained.By adjusting the position change cooling distance of cross air blasting during melt spinning, the conditions such as wind speed, the spinning speed of cross air blasting are adjusted to control the degree of hollowness of doughnut in 20.0%~45.0% range, while the radius of curvature of 3 D stereo curly form is within the scope of 10.0mm~50.0mm.The doughnut of identical fibre diameter is compared with middle real fiber, and the fluffy degree using fluffy processed filament made from degree of hollowness fiber is higher, and the higher light weight sense of degree of hollowness is more obvious.If the radius of curvature of the doughnut is too small, the coherent between fibre single thread is high, and fiber is not easy fibrillation in fluffy silk process, and fiber be formed by annulus diameter it is less than normal, influence the bulkiness for processing tow；Conversely, the crimp radius of fiber is too greatly, fibroplastic circle diameter is excessive after being processed into fluffy processing tow, can weaken or can not embody the three-dimensional stereo effect of sheath fiber script, also will affect the bulkiness of processing tow.
According to hollow spinneret plate discharge hole shape, the change of the difference and production technology of arrangement, it is obtained in
The section of hollow fiber is also slightly different, and the shape of hollow space has the different shapes such as round, subtriangular, approximating square, approximate pentagon, while the hole count on hollow section is not only limited in a hole.
The long stapled filament number of hollow polyester of the invention ranges preferably from 4.0dtex~15.0dtex.As the raw fibre of fluffy processing tow, filament fineness is higher, and the rigidity of fiber is better, and the fluffy degree of manufactured fluffy tow can be better, while resistance to pressure, recovery also can be better.But if monfil diameter is excessive, when spinning, is not easy to cool down, and the homogeneity of fiber is declined, while manufactured fluffy tow feel can be partially hard.So more preferably the long stapled filament number range of hollow polyester is 5.0dtex~10.0dtex.
The long stapled raw material of hollow polyester of the invention is mainly common polyester, such as polyethylene terephthalate, polypropylene terephthalate or polybutylene terephthalate (PBT), in order to assign fluffy processed filament special function, also the modified copolymer of above-mentioned polymer can be used, such as the polymer etc. that antibiosis anti-acarien is modified, it can also reach the same effect of conventional polyester in fluffy aspect of performance.
Hollow polyester long fibre is as production filling one of the raw material of fluffy processing tow, it can be direct N root and merge to form fluffy processing tow and be directly used as filling long cotton, it is also possible to merge with other raw materials and uses, for example combined yarn can be made with the slightly lower fiber of fusing point, it is then used as filling long cotton；Or further by combined yarn again with hollow polyester long fibre carry out core sheath it is compound carry out again part melt processing superior fluffy processing tow is made, be then used as filling long cotton.
Hollow polyester long fibre of the invention is still three-dimensional shape after 160 DEG C × 3min dry heat treatment, and due to the influence that fiber is heat-shrinked, wrapped configuration can be changed, and preferred curvature radius is 3.5mm~10.0mm.In this case, the working process even through road later, hollow polyester long fibre are still able to maintain fluffy 3 D stereo curly form, and feel, bulkiness, heat insulating ability etc. are had excellent performance.
The hollow long fibre of long fibre polyester of the present invention can be prepared via a method which to obtain, but be not limited to this method:
Firstly, Starting Material Polyester slice is dried, so that the moisture content of polyester slice reduces, spinnability is improved, controls the moisture rate of slice in 50ppm or less.Slice after drying carries out spinning by way of general melt spinning.Metering pump is transported to by piping after screw rod or hot plate are slice melting, melt polymers enter filament spinning component after metering pump accurate measurement, and spinneret used in filament spinning component is the dedicated spinneret of hollow fiber spinning.From spinneret spue polymer through supercooling, oil after batched.There is the doughnut of micro- curling in order to obtain, have cooling distance (distance on edge in spinneret lower edge to cooling cross air blasting) compared with strict requirements in spinning process, general control is within the scope of 10~150mm, within the scope of preferably 60~100mm.Simultaneously in order to make the construction of doughnut two sides form difference, the wind speed of cross air blasting is also to require, different according to fiber species (total fiber number and number of monofilaments),
General control is in the range of 25~90m/min, preferably 30~50m/min.
When the cooling distance is less than 10mm, the polymer to spue from spinneret is quickly cooled down, asymmetric effect is obvious, the radius of curvature of obtained fiber can be too small, coherent between fibre single thread is high, lofting effect is influenced, while spinneret temperature is easily reduced and leads to fibrous fracture, spinnability is bad；When the cooling distance is greater than 150mm, the polymer to spue from spinneret uniform decrease in temperature to a certain extent, even if carrying out pressure cooling by cross air blasting again, asymmetric effect has also weakened, and the radius of curvature for obtaining fiber can be excessive, also will affect lofting effect.
When the wind speed of the cross air blasting is less than 25m/min, unsymmetrical excavation effect is unobvious, and the radius of curvature for obtaining fiber is excessive；When the wind speed of the cross air blasting is greater than 90m/min, asymmetrical effect can be obvious, and the radius of curvature for leading to obtain fiber is too small, while cross air blasting is excessive will lead to that fiber rocking tendency is big, and spinning is unstable, is easy to appear the monofilament that floats, fracture of wire phenomenon.
Cause physical property different because of cooling difference between monofilament in order to prevent, preferably ' plover ' arrangement of the arrangement mode in spinneret discharge hole, namely what is often called diamond array.It is preferred that this spinning technique mainly uses single step spining art, i.e. spinning/stretching is completed at the same time, that is, the FDY being commonly called as.But can also be made by two-step method, i.e., it is worth the fiber of preorientation first, that is, then the POY being commonly called as carries out draft process, that is, the DT being commonly called as using elongator.
The hollow long fibre of polyester of the present invention has three-dimensional crimp structure, while fibre single thread is thicker, fluffy processing tow is made with high excluded volume, and with high fluffy degree with the hollow long fibre, while having excellent compression resistant characteristic.
Test method of the present invention is as follows:
(1) test method of total fiber number and filament number
The test of total fiber number according to JIS L 1013:2010 standard testing, filament number is calculated by total fiber number and number of monofilaments.
(2) hollow rate
Hollow long fibre is cut off into flakiness (i.e. fiber cross section) along longitudinal direction, suitable multiplying power is amplified under ordinary optical microscope and is taken pictures, the area S of hollow space is calculated according to photo1With the area S of fiber entirety2(including hollow portion) then calculates:
Hollow rate=(S1/S2) × 100%.
(3) radius of curvature test method
The radius of curvature of nature: sample curling 10 is enclosed into (1 meter/circle) by dipping machine (fiber number measurement is used) by yarn, then by sample to be tested (20 DEG C × 65%RH) placement (hanging) 8h of constant-temperature constant-humidity environment or more than make its in stable condition (such as Fig. 3), then 20 centimetres of inner curved portions below sample are chosen and carry out radius measurement, are chosen
It is averaged after 20 different places measurements, the data obtained is radius of curvature.Measuring instrument is the digital micrograph system (VHX-2000C) that Keyemce (KEYENCE) is produced, and enlargement ratio is 20 times, and the measurement (such as Fig. 4) of radius of curvature is carried out by the computing function of software mean curvature radius.The radius of curvature of fiber is measured by three positions on crimped fibre.
Radius of curvature after dry heat treatment processing: sample is crimped into 10 circles by dipping machine (fiber number measurement is used) by yarn, it is then placed in drying machine and is heat-treated, treatment conditions are 160 DEG C × 3min, then sample is placed into 4h or more in constant-temperature constant-humidity environment, it finally chooses 20 centimetres of lower section inner curved portion and carries out radius measurement, be averaged after choosing 20 different places measurements.The data obtained is radius of curvature.
(4) fluffy degree
It is tested according to IDFB method:
It is debugged 8 hours or 8 hours or more 1. being first placed on sample to be tested in the environment of 20 DEG C × 65%RH, so that sample to be tested is stablized；
2. weighing sample 30g, puts it into measurement bucket and close the lid after being shaken soft fluffy state manually；
3. weight disk to be moved downward to the highest point of contact sample, then decontroling weight disk makes its free-falling, timing while decontroling weight disk, and height is read after stablizing 1 minute and is recorded；
4. opening lid takes out sample, shaken again to soft fluffy state, is put into measurement bucket and closes the lid, 3. measured again according to step, same method is tested 5 times；
5. by the way that fluffy degree is calculated after calculating 5 average heights.
Illustrate the contents of the present invention by the following examples, but the invention is not limited to contents listed by embodiment.
Embodiment 1:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 25m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 300T-20f, hollow section is that triangle is hollow, degree of hollowness 20.0%, filament number 15.0dtex, radius of curvature before heat treatment is 50.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 10.0mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 390inch3/30g.Specifically it is shown in Table 1.
Embodiment 2:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 40m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 150T-10f, hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 15.0dtex, radius of curvature before heat treatment is 42.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 8.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 600inch3/30g.Specifically it is shown in Table 1.
Embodiment 3:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 40m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 60T-4f, and hollow section is that triangle is hollow, degree of hollowness 45.0%, filament number 15.0dtex, and the radius of curvature before heat treatment is 37.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 7.0mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 800inch3/30g.Specifically it is shown in Table 1.
Embodiment 4:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 10.0dtex, radius of curvature before heat treatment is 40.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 7.8mm.Select the fibre
The raw material as sheath fiber and core fibre is tieed up, is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 650inch3/30g.Specifically it is shown in Table 1.
Embodiment 5:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 50m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-20f, hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 5.0dtex, radius of curvature before heat treatment is 35.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 6.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 610inch3/30g.Specifically it is shown in Table 1.
Embodiment 6:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 75m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 60T-15f, and hollow section is that triangle is hollow, degree of hollowness 45.0%, filament number 4.0dtex, and the radius of curvature before heat treatment is 10.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 3.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 480inch3/30g.Specifically it is shown in Table 1.
Embodiment 7:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, and the spinneret of filament spinning component is hollow special spinning jet, cooling distance 65mm, the wind speed of cross air blasting is 70m/min
Hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 65T-10f, and hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 6.5dtex, and the radius of curvature before heat treatment is 30.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 6.0mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 580inch3/30g.Specifically it is shown in Table 1.
Embodiment 8:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 70m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 50T-10f, and hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 5.0dtex, and the radius of curvature before heat treatment is 20.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 4.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 520inch3/30g.Specifically it is shown in Table 1.
Embodiment 9:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 25m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 60T-4f, and hollow section is that quadrangle is hollow, degree of hollowness 45.0%, filament number 15.0dtex, and the radius of curvature before heat treatment is 42.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 8.1mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 760inch3/30g.Specifically it is shown in Table 1.
Embodiment 10:
Raw material is using common polypropylene terephthalate slice (i.e. common 3GT), by the poly terephthalic acid the third two
Alcohol ester is dried by pre-crystallized dehumidifying heat pump, and moisture rate is 30ppm after drying.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 10.0dtex, radius of curvature before heat treatment is 38.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 7.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 630inch3/30g.Specifically it is shown in Table 1.
Embodiment 11:
The polybutylene terephthalate (PBT) is dried by pre-crystallized dehumidifying heat pump using common polybutylene terephthalate (PBT) slice (i.e. common PBT) for raw material, and moisture rate is 33ppm after drying.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 10.0dtex, radius of curvature before heat treatment is 36.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 7.0mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 600inch3/30g.Specifically it is shown in Table 2.
Embodiment 12:
Raw material uses cation-modified polyethylene terephthalate slice, which is dried by pre-crystallized dehumidifying heat pump, and moisture rate is 30ppm after drying.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 33.0%, filament number 10.0dtex, radius of curvature before heat treatment is 33.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 6.4mm.It selects the fiber as the raw material of sheath fiber and core fibre, is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, be processed into the fluffy silk of core-sheath-type, and 6 plying, obtain bulkiness processing tow, test fluffy processing
The fluffy degree of tow is 610inch3/30g.Specifically it is shown in Table 2.
Embodiment 13:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 10mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 40.0%, filament number 10.0dtex, radius of curvature before heat treatment is 12.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 3.6mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 490inch3/30g.Specifically it is shown in Table 2.
Embodiment 14:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 60mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 37.0%, filament number 10.0dtex, radius of curvature before heat treatment is 30.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 6.1mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 600inch3/30g.Specifically it is shown in Table 2.
Embodiment 15:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 90mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, and hollow section is that triangle is hollow, degree of hollowness 32.0%, filament number 10.0dtex, before heat treatment
Radius of curvature be 34.0mm, radius of curvature after 160 DEG C × 3min dry heat treatment is 9.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 720inch3/30g.Specifically it is shown in Table 2.
Embodiment 16:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 110mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 30.0%, filament number 10.0dtex, radius of curvature before heat treatment is 38.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 12.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 620inch3/30g.Specifically it is shown in Table 2.
Embodiment 17:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 150mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 25.0%, filament number 10.0dtex, radius of curvature before heat treatment is 44.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 14.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 550inch3/30g.Specifically it is shown in Table 2.
Embodiment 18:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.For slice after drying by being transported to metering pump through piping after screw rod melt extruded, the polymer after metering pump accurate measurement is delivered to spinning group
Part, the spinneret of filament spinning component are hollow special spinning jet, and cooling distance 65mm, the wind speed of cross air blasting is 90m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 35.0%, filament number 10.0dtex, radius of curvature before heat treatment is 18.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 3.9mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 510inch3/30g.Specifically it is shown in Table 2.
Embodiment 19:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 50m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 28.0%, filament number 10.0dtex, radius of curvature before heat treatment is 28.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 4.5mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 530inch3/30g.Specifically it is shown in Table 2.
Comparative example 1:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is common circular hole spinneret, cooling distance is 65mm, the wind speed of cross air blasting is 25m/min, and polyester fiber is made after DSD high-speed spinning process.The characteristic of fiber is as follows: fiber species 56T-24f, and section is solid circles, and filament number 2.3dtex, heat treatment front and back is all without curl characteristics.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 240inch3/30g.Specifically it is shown in Table 3.
Due to fiber cross section transverse be it is solid, gained fiber does not generate curling, and fluffy degree is small, be not suitable for alternatively feather filling cotton use.
Comparative example 2:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 90mm, the wind speed of cross air blasting is 35m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 10.0%, filament number 10.0dtex, radius of curvature before heat treatment is 40.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 10.0mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 310inch3/30g.Specifically it is shown in Table 3.
Since the degree of hollowness of fiber is too small, although there is radius of curvature, light weight is poor, and fluffy degree is small, and the filling cotton for being not suitable for alternatively feather uses.
Comparative example 3:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 5mm, the wind speed of cross air blasting is 35m/min, carries out spinning by DSD high-speed spinning process.Since cooling distance is too close, although spinning can be carried out, fracture of wire and float that a phenomenon is serious, and the feasibility of production is low.Specifically it is shown in Table 3.
Comparative example 4:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 110m/min, carries out spinning by DSD high-speed spinning process.Since cross air blasting wind speed is too big, although spinning can be carried out, fiber shake seriously leads to fracture of wire and floats that a phenomenon is serious, and the feasibility of production is low.Specifically it is shown in Table 3.
Comparative example 5:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying passes through
Metering pump is transported to through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 200mm, the wind speed of cross air blasting is 70m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 15.0%, filament number 10.0dtex, radius of curvature before heat treatment is 65.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 23.0mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 350inch3/30g.Specifically it is shown in Table 3.
Since cooling distance is too big, the radius of curvature of gained fiber is too big, can not embody the three-dimensional stereo effect of fiber, causes bulkiness small.
Comparative example 6:
Raw material the polyester slice is dried by pre-crystallized dehumidifying heat pump, moisture rate is 39ppm after drying using polyester slice (T200N of Dong Li fiber Synthon BV production) semi-dull.Slice after drying is by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow special spinning jet, cooling distance is 65mm, the wind speed of cross air blasting is 20m/min, and hollow polyester fibre is made after DSD high-speed spinning process.The characteristic of doughnut is as follows: fiber species 100T-10f, hollow section is that triangle is hollow, degree of hollowness 12.0%, filament number 10.0dtex, radius of curvature before heat treatment is 55.0mm, and the radius of curvature after 160 DEG C × 3min dry heat treatment is 20.0mm.Select the fiber as the raw material of sheath fiber and core fibre, it is fed with the overfeeding that sheath silk feeding speed/core filaments feeding speed is 20 times, is processed 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 350inch3/30g.Specifically it is shown in Table 3.
Since cross air blasting wind speed is too small, the radius of curvature of gained fiber is too big, can not embody the three-dimensional stereo effect of fiber, causes bulkiness small.
Table 1
Table 2
Table 3
Claims (8)
- A kind of hollow long fibre of polyester, it is characterised in that: the long stapled cross section degree of hollowness is 20.0%~45.0%, 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 10.0mm~50.0mm.
- The hollow long fibre of polyester according to claim 1, it is characterised in that: the long stapled filament number is 4.0dtex~15.0dtex.
- The hollow long fibre of polyester according to claim 2, it is characterised in that: the long stapled filament number is 5.0dtex~10.0dtex.
- The hollow long fibre of polyester according to claim 1 or 2, it is characterised in that: radius of curvature of the long fibre after 160 DEG C × 3min dry heat treatment is 3.5mm~10.0mm.
- The hollow long fibre of polyester according to claim 1 or 2, it is characterised in that: the polyester is polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate (PBT) or theirs is polymer-modified.
- The hollow long stapled preparation method of polyester described in a kind of claim 1, it is characterized by: by the slice after drying by being transported to metering pump through piping after screw rod melt extruded, polymer after metering pump accurate measurement is delivered to filament spinning component, the spinneret of filament spinning component is hollow spinneret plate, cooling distance is 10~150mm, and the wind speed of cross air blasting is 25~90m/min.
- The hollow long stapled preparation method of polyester according to claim 6, it is characterised in that: the cooling distance is 60~110mm.
- The hollow long stapled preparation method of polyester described according to claim 6 or 7, it is characterised in that: the wind speed of the cross air blasting is 30~50m/min.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611205849.8A CN108239794A (en) | 2016-12-23 | 2016-12-23 | A kind of hollow long fibre of polyester |
| CN2016112058498 | 2016-12-23 | ||
| PCT/CN2017/117924 WO2018113767A1 (en) | 2016-12-23 | 2017-12-22 | Hollow polyester long fiber and preparation method therefor |
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| CN109844189A true CN109844189A (en) | 2019-06-04 |
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| CN201611205849.8A Pending CN108239794A (en) | 2016-12-23 | 2016-12-23 | A kind of hollow long fibre of polyester |
| CN201780065153.6A Pending CN109844189A (en) | 2016-12-23 | 2017-12-22 | Hollow long fibre of polyester and preparation method thereof |
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| CN201611205849.8A Pending CN108239794A (en) | 2016-12-23 | 2016-12-23 | A kind of hollow long fibre of polyester |
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| US (1) | US20200017995A1 (en) |
| EP (1) | EP3561160B1 (en) |
| JP (1) | JP7081598B2 (en) |
| KR (1) | KR102338025B1 (en) |
| CN (2) | CN108239794A (en) |
| AU (1) | AU2017379039A1 (en) |
| CA (1) | CA3047479A1 (en) |
| PH (1) | PH12019501278A1 (en) |
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| CN110927161B (en) * | 2019-10-18 | 2022-03-11 | 中国移动通信集团浙江有限公司嘉兴分公司 | Visual inspection method suitable for flying fibers and flying impurities |
| JP2021121698A (en) | 2020-01-30 | 2021-08-26 | カール・フロイデンベルク・カー・ゲー | Square hollow fiber |
| WO2022004557A1 (en) * | 2020-06-29 | 2022-01-06 | 東レ株式会社 | Chenille yarn, fiber product, garment, and bedding |
| CN114351269B (en) * | 2021-12-31 | 2023-02-24 | 新凤鸣集团股份有限公司 | Same-plate reducing hollow crimped fiber and production method thereof |
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| RU2748416C2 (en) | 2021-05-25 |
| CA3047479A1 (en) | 2018-06-28 |
| JP2020502377A (en) | 2020-01-23 |
| TW201827661A (en) | 2018-08-01 |
| RU2019119407A3 (en) | 2021-01-26 |
| EP3561160A1 (en) | 2019-10-30 |
| PH12019501278A1 (en) | 2019-12-16 |
| AU2017379039A1 (en) | 2019-06-27 |
| RU2019119407A (en) | 2021-01-26 |
| CN108239794A (en) | 2018-07-03 |
| KR102338025B1 (en) | 2021-12-10 |
| KR20190092431A (en) | 2019-08-07 |
| TWI793092B (en) | 2023-02-21 |
| EP3561160B1 (en) | 2024-06-26 |
| EP3561160A4 (en) | 2020-08-26 |
| JP7081598B2 (en) | 2022-06-07 |
| US20200017995A1 (en) | 2020-01-16 |
| WO2018113767A1 (en) | 2018-06-28 |
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