CN117568968B - Production process of polyester fine denier yarn - Google Patents
Production process of polyester fine denier yarn Download PDFInfo
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- CN117568968B CN117568968B CN202410050313.1A CN202410050313A CN117568968B CN 117568968 B CN117568968 B CN 117568968B CN 202410050313 A CN202410050313 A CN 202410050313A CN 117568968 B CN117568968 B CN 117568968B
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- yarn
- fine denier
- carbon nanofiber
- hot box
- polyester fine
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- 229920000728 polyester Polymers 0.000 title claims abstract description 36
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims abstract description 25
- 239000002134 carbon nanofiber Substances 0.000 claims description 41
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 41
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 29
- 238000001816 cooling Methods 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 19
- 238000002360 preparation method Methods 0.000 claims description 19
- 241001589086 Bellapiscis medius Species 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 238000006243 chemical reaction Methods 0.000 claims description 16
- 229910021389 graphene Inorganic materials 0.000 claims description 16
- 229920001690 polydopamine Polymers 0.000 claims description 14
- 239000002131 composite material Substances 0.000 claims description 13
- 238000004804 winding Methods 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 11
- CTENFNNZBMHDDG-UHFFFAOYSA-N Dopamine hydrochloride Chemical compound Cl.NCCC1=CC=C(O)C(O)=C1 CTENFNNZBMHDDG-UHFFFAOYSA-N 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 8
- 229960001149 dopamine hydrochloride Drugs 0.000 claims description 8
- 238000002844 melting Methods 0.000 claims description 6
- 230000008018 melting Effects 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 5
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 2
- 125000003700 epoxy group Chemical group 0.000 claims description 2
- 230000010355 oscillation Effects 0.000 claims description 2
- 239000000243 solution Substances 0.000 claims description 2
- 238000012216 screening Methods 0.000 description 6
- 238000007493 shaping process Methods 0.000 description 6
- 238000009987 spinning Methods 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 3
- 239000011259 mixed solution Substances 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- BPSIOYPQMFLKFR-UHFFFAOYSA-N trimethoxy-[3-(oxiran-2-ylmethoxy)propyl]silane Chemical compound CO[Si](OC)(OC)CCCOCC1CO1 BPSIOYPQMFLKFR-UHFFFAOYSA-N 0.000 description 3
- LENZDBCJOHFCAS-UHFFFAOYSA-N tris Chemical compound OCC(N)(CO)CO LENZDBCJOHFCAS-UHFFFAOYSA-N 0.000 description 3
- 238000002788 crimping Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000004069 differentiation Effects 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 244000144992 flock Species 0.000 description 1
- 238000007306 functionalization reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- YOBAEOGBNPPUQV-UHFFFAOYSA-N iron;trihydrate Chemical compound O.O.O.[Fe].[Fe] YOBAEOGBNPPUQV-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
Classifications
-
- 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
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0206—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist by false-twisting
-
- 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
- D01F1/00—General methods for the manufacture of artificial filaments or the like
- D01F1/02—Addition of substances to the spinning solution or to the melt
- D01F1/10—Other agents for modifying properties
-
- 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
- D01F6/88—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds
- D01F6/92—Monocomponent artificial filaments or the like of synthetic polymers; Manufacture thereof from mixtures of polycondensation products as major constituent with other polymers or low-molecular-weight compounds of polyesters
-
- 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
- D02G1/02—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist
- D02G1/0286—Producing crimped or curled fibres, filaments, yarns, or threads, giving them latent characteristics by twisting, fixing the twist and backtwisting, i.e. by imparting false twist characterised by the use of certain filaments, fibres or yarns
-
- 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
- D02G1/20—Combinations of two or more of the above-mentioned operations or devices; After-treatments for fixing crimp or curl
- D02G1/205—After-treatments for fixing crimp or curl
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/08—Interlacing constituent filaments without breakage thereof, e.g. by use of turbulent air streams
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
- D02J1/221—Preliminary treatments
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
- D02J13/001—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a tube or vessel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Abstract
The application relates to a production process of polyester fine denier yarn, which comprises the following steps: s1, leading out the pre-oriented yarn through a yarn frame, passing through a yarn cutter, passing through a pre-network, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twist stop device to be heated, so as to obtain heat treatment yarn; s2, obtaining false twisted yarns by heat treatment of the yarns; s3, obtaining fine denier yarns by false twisting yarns; wherein the pre-network pressure is 0.2-0.7bar. The production process can effectively control the situation that the fine denier yarn has broken filaments and ends, and the produced finished product has better quality.
Description
Technical Field
The application relates to the field of spinning, in particular to a production process of polyester fine denier yarns.
Background
Along with the continuous pursuit of differentiation and functionalization of clothes, the raw materials of clothes are continuously promoted and new, and polyester filaments as the raw materials of clothes are continuously developed to be fine denier and superfine denier. The polyester fine denier yarn is used as a fiber with higher fineness index, has stronger detergency, higher wearing comfort, excellent dyeing property and good chemical resistance, and has a plurality of excellent qualities, so that the polyester fine denier yarn is widely applied to the fields of various clothes, home textiles and the like,
Along with the gradual improvement of market demands, the quality requirements for the polyester fine denier yarn are higher and higher, and the quality of the product is difficult to control by the existing production process due to small fineness of the polyester fine denier yarn, and the conditions of more finished product flocks and easy breakage are easy to occur, so that the problem of how to improve the quality of the finished product of the fine denier yarn is the problem to be solved at present.
Disclosure of Invention
In order to improve the quality of finished products of the polyester fine denier yarns, the application provides a production process of the polyester fine denier yarns.
The production process of the polyester fine denier yarn provided by the application adopts the following technical scheme:
the production process of the polyester fine denier yarn comprises the following steps:
s1, leading out the pre-oriented yarn through a yarn frame, passing through a yarn cutter, passing through a pre-network, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twist stop device to be heated, so as to obtain heat treatment yarn;
s2, obtaining false twisted yarns by heat treatment of the yarns;
s3, obtaining fine denier yarns by false twisting yarns;
wherein the pre-network pressure is 0.2-0.7bar.
Through adopting above-mentioned technical scheme, after the raw materials formed the precursor through the filament cutter, at the in-process that the precursor was carried to the wire guide ware, the precursor was easily rubbed and fracture, easily appears the filigree because of receiving the friction in the follow-up course of working simultaneously to can cause the finished product to take place the fracture easily. The yarn bundle is subjected to pre-network treatment before entering a roller, and certain air pressure is given to the yarn bundle, so that the cohesion of the yarn bundle is improved, the possibility of generating broken filaments in the subsequent processing process of the yarn bundle is further reduced, and the finished product is ensured to have stronger breaking strength. Meanwhile, the presaid is limited to 0.2-0.7bar, so that the presaid has the effect of increasing the cohesion of the filament bundles, and the stretching of the filament bundles is not negatively influenced, and further the follow-up processing procedure can be smoothly carried out.
In a specific embodiment, in step S1, the heating temperature of the deformation hot box is 165-175 ℃.
By adopting the technical scheme, the specific temperature is favorable for the thermal movement of the molecular chains in the tows, so that the molecular chains form the tows which are orderly arranged and easy to crystallize and are completely crystallized, the molecular chains are orderly and tightly arranged, the intermolecular acting force is strong, and the breaking strength of the tows is effectively improved. When the temperature is beyond the temperature range defined by the application, the temperature is too high, so that the molecular chains in the tows are difficult to be orderly arranged and are not easy to crystallize, and the temperature is too low, so that the molecular chains are not easy to move and are not easy to crystallize.
In a specific embodiment, in step S1, the draw ratio is 1.62 to 1.66 before the tow enters the texturing oven.
Through adopting above-mentioned technical scheme, make the silk bundle obtain effective stretching through specific draft multiple, if the draft multiple is too high, the silk bundle is broken easily and then causes the product to appear the condition of broken silk, if the draft multiple is too low, the silk bundle receives the drawing not enough, and the trend nature of inside molecular weight is relatively poor, and then also can cause the finished product quality relatively poor, easily appears cracked condition.
In a specific embodiment, step S2 is to cool the heat-treated yarn by passing the yarn guide through a cooling plate and then into a false twister to obtain a false twisted yarn.
In a specific embodiment, the false twister D/Y ratio is from 1.6 to 1.7.
By adopting the technical scheme, the condition that the yarn is easy to appear when the D/Y ratio is too high, the tightening point is easy to appear when the D/Y ratio is too low, and the indexes such as the crimping performance, the strength and the like of the yarn bundles can be kept stable by limiting the D/Y ratio in a specific range, so that the stable production is facilitated.
In a specific embodiment, step S3 is to make the false twisted yarn enter two rollers through a yarn guide, and then make the false twisted yarn pass through a network device, an auxiliary roller, a lower hot box and an oiling machine, and then make the false twisted yarn be wound and formed to obtain the fine denier yarn.
In a specific embodiment, the two-roller speed is 600-650m/min.
By adopting the technical scheme, the speed is too high, the friction of the tows is increased, the probability of subsequent broken filaments and ends is improved, the quality of the finished product is reduced, the speed is kept in a specific range, the thickness and uniformity of the finished product are effectively ensured, and the quality of the produced finished product is stable.
In a specific embodiment, the lower hot box temperature is 155-185 ℃.
By adopting the technical scheme, the appropriate temperature is favorable for increasing the cohesion and bundling property inside the filament bundle, is favorable for subsequent winding and forming, and is not easy to cause the conditions of broken filaments and broken ends.
In a specific embodiment, the network pressure is 1.5-1.7bar.
By adopting the technical scheme, the cohesive force of the tows is increased, and the breaking strength of the finished product is improved.
In a specific embodiment, the preparation of the raw material pre-oriented yarn: and mixing the polyester chips and the spiral carbon nanofiber composite graphene, and obtaining the pre-oriented yarn through melting, extruding, cooling, oiling and winding.
In a specific embodiment, the preparation of the helical carbon nanofiber composite graphene is as follows: dissolving dopamine hydrochloride in an alkaline aqueous solution, adding the spiral carbon nanofiber, carrying out ultrasonic oscillation, heating for reaction, and centrifuging to obtain the polydopamine-coated spiral carbon nanofiber;
mixing the polydopamine coated spiral carbon nanofiber with a silane coupling agent solution containing epoxy groups, heating for reaction, then adding the hydroxylated graphene, and centrifuging after the reaction to obtain the spiral carbon nanofiber composite graphene.
In a specific embodiment, when the hydroxylated graphene is added for reaction, the weight ratio of the hydroxylated graphene to the polydopamine coated helical carbon nanofiber is (2-3): 1.
by adopting the technical scheme, the spiral carbon nanofiber can improve the toughness of the pre-oriented yarn, so that the toughness of the fine denier yarn can be improved, the graphene can form a hydrogen bond with a PET molecular chain, after the graphene is compounded with the spiral carbon nanofiber, the graphene, the spiral carbon nanofiber and the PET molecular chain can form a cross-linked network structure, the cohesion of the molecular chain inside the fine denier yarn is effectively improved, the fine denier yarn can show excellent breaking strength, and the probability of broken filaments and broken ends is reduced.
In summary, the present application includes at least one of the following beneficial technical effects:
the pre-networking step is added, so that the cohesion of the filament bundle is increased, the subsequent situations of broken filaments and broken ends are reduced, and meanwhile, the quality of a finished product is effectively ensured by limiting parameters such as draft multiple, deformation hot box temperature, false twister D/Y ratio, two-roller speed, lower hot box temperature and the like;
according to the preparation method, the pre-oriented yarn is prepared by mixing the polyester and the spiral carbon nanofiber composite graphene, so that the performance of the pre-oriented yarn is effectively improved, and when the pre-oriented yarn is used for preparing the fine denier yarn, the quality of the fine denier yarn can be effectively ensured, and the occurrence of the conditions of broken filaments and broken ends is effectively reduced.
Description of the embodiments
The present application is described in further detail below with reference to examples.
The spiral carbon nanofibers in the present application were purchased from sienna ziyue biotechnology limited; hydroxylated graphene, model BK2020061759; the model of the polyester chip is Huarun CR-8863.
Preparation example 1
Dopamine hydrochloride and tris (hydroxymethyl) aminomethane aqueous solution are mixed according to the weight ratio of 2:500, and then mixing the dopamine hydrochloride and the spiral carbon nano fiber according to the weight ratio of 1:1, putting the spiral carbon nanofiber into a mixed solution, heating to 65 ℃ for reaction for 20 hours, cooling and centrifuging to obtain the polydopamine-coated spiral carbon nanofiber;
the method comprises the steps of mixing polydopamine coated spiral carbon nanofiber and gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane aqueous solution with the mass concentration of 3% according to the weight ratio of 1:3, mixing, heating to 70 ℃ for reaction for 1h, and then adding hydroxylated graphene, wherein the mass ratio of the hydroxylated graphene to the polydopamine coated helical carbon nanofiber is 2: and 1, continuing to react for 1h, and centrifuging after the reaction to obtain the spiral carbon nanofiber composite graphene.
Preparation example 2
Dopamine hydrochloride and tris (hydroxymethyl) aminomethane aqueous solution are mixed according to the weight ratio of 2:500, and then mixing the dopamine hydrochloride and the spiral carbon nano fiber according to the weight ratio of 1:1, putting the spiral carbon nanofiber into a mixed solution, heating to 65 ℃ for reaction for 20 hours, cooling and centrifuging to obtain the polydopamine-coated spiral carbon nanofiber;
the method comprises the steps of mixing polydopamine coated spiral carbon nanofiber and gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane aqueous solution with the mass concentration of 3% according to the weight ratio of 1:3, mixing, heating to 70 ℃ for reaction for 1h, and then adding hydroxylated graphene, wherein the mass ratio of the hydroxylated graphene to the polydopamine coated helical carbon nanofiber is 3: and 1, continuing to react for 1h, and centrifuging after the reaction to obtain the spiral carbon nanofiber composite graphene.
Preparation example 3
Dopamine hydrochloride and tris (hydroxymethyl) aminomethane aqueous solution are mixed according to the weight ratio of 2:500, and then mixing the dopamine hydrochloride and the spiral carbon nano fiber according to the weight ratio of 1:1, putting the spiral carbon nanofiber into a mixed solution, heating to 65 ℃ for reaction for 20 hours, cooling and centrifuging to obtain the polydopamine-coated spiral carbon nanofiber;
the method comprises the steps of mixing polydopamine coated spiral carbon nanofiber and gamma- (2, 3-epoxypropoxy) propyl trimethoxy silane aqueous solution with the mass concentration of 3% according to the weight ratio of 1:3, mixing, heating to 70 ℃ for reaction for 1h, and then adding hydroxylated graphene, wherein the mass ratio of the hydroxylated graphene to the polydopamine coated helical carbon nanofiber is 1: and 1, continuing to react for 1h, and centrifuging after the reaction to obtain the spiral carbon nanofiber composite graphene.
Preparation example 4
The weight ratio of the polyester chip to the spiral carbon nanofiber composite graphene prepared in the preparation example 1 is 15:2, mixing, melting, extruding through a spinneret plate, cooling, oiling and winding to obtain the pre-oriented yarn, wherein the spinning temperature is 280 ℃ and the cooling temperature is 120 ℃.
Preparation example 5
The weight ratio of the polyester chip to the spiral carbon nanofiber composite graphene prepared in preparation example 2 is 15:3, mixing, melting, extruding through a spinneret plate, cooling, oiling and winding to obtain the pre-oriented yarn, wherein the spinning temperature is 280 ℃, and the cooling temperature is 120 ℃.
Preparation example 6
The weight ratio of the polyester chip to the spiral carbon nanofiber composite graphene prepared in preparation example 3 is 15:2, mixing, melting, extruding through a spinneret plate, cooling, oiling and winding to obtain the pre-oriented yarn, wherein the spinning temperature is 280 ℃ and the cooling temperature is 120 ℃.
Preparation example 7
The polyester chip, the spiral carbon nanofiber and the hydroxylated graphene are mixed according to the weight ratio of 15:1:1, mixing, melting, extruding through a spinneret plate, cooling, oiling and winding to obtain the pre-oriented yarn, wherein the spinning temperature is 280 ℃, and the cooling temperature is 120 ℃.
Example 1
The production process of the polyester fine denier yarn comprises the following steps:
s1, leading out the pre-oriented yarn through a yarn frame, entering a yarn cutter, entering a pre-networking device, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twist stopping device to be heated, so as to obtain heat treatment yarn; wherein, the pre-oriented yarn is purchased from Tung Kun Heng Chao, and the model is C-1040260361;
wherein the pressure of the pre-network device is 0.2bar, the draft multiple is 1.58, and the temperature of the deformation hot box is 155 ℃;
s2, cooling the heat-treated yarn through a yarn guide into a cooling plate, and then twisting and untwisting the heat-treated yarn through a false twister to obtain a false twisted yarn; wherein the D/Y ratio of the false twister is 1.6;
s3, feeding the false-twist yarn into a two-roller through a yarn guide, screening through a network device, shaping through an auxiliary roller and a lower hot box, oiling, and winding to form to obtain a fine denier yarn;
wherein the speed of the two rollers is 600m/min, the temperature of the lower hot box is 140 ℃, and the pressure of the network device is 1.5bar.
Example 2-example 25
Example 2-example 25 the same procedure was followed as in example 1, except that the specific process parameters were varied as specified in table 1.
Table 1 process parameters in example 1-example 25
| Category(s) | Pre-network pressure/bar | Draft multiple | Deformation hot box temperature/DEGC | D/Y ratio of false twister | Two-roller speed/m/min | Network pressure/bar | Lower hot box temperature/°c |
| Example 1 | 0.2 | 1.58 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 2 | 0.5 | 1.58 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 3 | 0.7 | 1.58 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 4 | 0.1 | 1.58 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 5 | 0.8 | 1.58 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 6 | 0.2 | 1.62 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 7 | 0.2 | 1.64 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 8 | 0.2 | 1.66 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 9 | 0.2 | 1.67 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 10 | 0.2 | 1.70 | 155 | 1.6 | 600 | 1.5 | 140 |
| Example 11 | 0.2 | 1.58 | 165 | 1.6 | 600 | 1.5 | 140 |
| Example 12 | 0.2 | 1.58 | 175 | 1.6 | 600 | 1.5 | 140 |
| Example 13 | 0.2 | 1.58 | 185 | 1.6 | 600 | 1.5 | 140 |
| Example 14 | 0.2 | 1.58 | 155 | 1.65 | 600 | 1.5 | 140 |
| Example 15 | 0.2 | 1.58 | 155 | 1.7 | 600 | 1.5 | 140 |
| Example 16 | 0.2 | 1.58 | 155 | 1.6 | 610 | 1.5 | 140 |
| Example 17 | 0.2 | 1.58 | 155 | 1.6 | 630 | 1.5 | 140 |
| Example 18 | 0.2 | 1.58 | 155 | 1.6 | 640 | 1.5 | 140 |
| Example 19 | 0.2 | 1.58 | 155 | 1.6 | 650 | 1.5 | 140 |
| Example 20 | 0.2 | 1.58 | 155 | 1.6 | 670 | 1.5 | 140 |
| Example 21 | 0.2 | 1.58 | 155 | 1.6 | 600 | 1.6 | 140 |
| Example 22 | 0.2 | 1.58 | 155 | 1.6 | 600 | 1.7 | 140 |
| Example 23 | 0.2 | 1.58 | 155 | 1.6 | 600 | 1.5 | 155 |
| Example 24 | 0.2 | 1.58 | 155 | 1.6 | 600 | 1.5 | 170 |
| Example 25 | 0.2 | 1.58 | 155 | 1.6 | 600 | 1.5 | 185 |
Example 26
The production process of the polyester fine denier yarn comprises the following steps:
s1, leading out the pre-oriented yarn in the preparation example 4 through a yarn frame, entering a yarn cutter, entering a pre-network device, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twisting stopper to be heated, so as to obtain heat treatment yarn;
wherein the pressure of the pre-network device is 0.5bar, the draft multiple is 1.58, and the temperature of the deformation hot box is 155 ℃;
s2, cooling the heat-treated yarn through a yarn guide into a cooling plate, and then twisting and untwisting the heat-treated yarn through a false twister to obtain a false twisted yarn; wherein the D/Y ratio of the false twister is 1.6;
s3, feeding the false-twist yarn into a two-roller through a yarn guide, screening through a network device, shaping through an auxiliary roller and a lower hot box, oiling, and winding to form to obtain a fine denier yarn;
wherein the speed of the two rollers is 600m/min, the temperature of the lower hot box is 140 ℃, and the pressure of the network device is 1.5bar.
Example 27
The production process of the polyester fine denier yarn comprises the following steps:
s1, leading out the pre-oriented yarn in the preparation example 5 through a yarn frame, entering a yarn cutter, entering a pre-network device, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twisting stopper to be heated, so as to obtain heat treatment yarn;
wherein the pressure of the pre-network device is 0.5bar, the draft multiple is 1.58, and the temperature of the deformation hot box is 155 ℃;
s2, cooling the heat-treated yarn through a yarn guide into a cooling plate, and then twisting and untwisting the heat-treated yarn through a false twister to obtain a false twisted yarn; wherein the D/Y ratio of the false twister is 1.6;
s3, feeding the false-twist yarn into a two-roller through a yarn guide, screening through a network device, shaping through an auxiliary roller and a lower hot box, oiling, and winding to form to obtain a fine denier yarn;
wherein the speed of the two rollers is 600m/min, the temperature of the lower hot box is 140 ℃, and the pressure of the network device is 1.5bar.
Example 28
The production process of the polyester fine denier yarn comprises the following steps:
s1, leading out the pre-oriented yarn in the preparation example 6 through a yarn frame, entering a yarn cutter, entering a pre-network device, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twisting stopper to be heated, so as to obtain heat treatment yarn;
wherein the pressure of the pre-network device is 0.5bar, the draft multiple is 1.58, and the temperature of the deformation hot box is 155 ℃;
s2, cooling the heat-treated yarn through a yarn guide into a cooling plate, and then twisting and untwisting the heat-treated yarn through a false twister to obtain a false twisted yarn; wherein the D/Y ratio of the false twister is 1.6;
s3, feeding the false-twist yarn into a two-roller through a yarn guide, screening through a network device, shaping through an auxiliary roller and a lower hot box, oiling, and winding to form to obtain a fine denier yarn;
wherein the speed of the two rollers is 600m/min, the temperature of the lower hot box is 140 ℃, and the pressure of the network device is 1.5bar.
Example 29
The production process of the polyester fine denier yarn comprises the following steps:
s1, leading out the pre-oriented yarn in the preparation example 7 through a yarn frame, entering a yarn cutter, entering a pre-network device, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twisting stopper to be heated, so as to obtain heat treatment yarn;
wherein the pressure of the pre-network device is 0.5bar, the draft multiple is 1.58, and the temperature of the deformation hot box is 155 ℃;
s2, cooling the heat-treated yarn through a yarn guide into a cooling plate, and then twisting and untwisting the heat-treated yarn through a false twister to obtain a false twisted yarn; wherein the D/Y ratio of the false twister is 1.6;
s3, feeding the false-twist yarn into a two-roller through a yarn guide, screening through a network device, shaping through an auxiliary roller and a lower hot box, oiling, and winding to form to obtain a fine denier yarn;
wherein the speed of the two rollers is 600m/min, the temperature of the lower hot box is 140 ℃, and the pressure of the network device is 1.5bar.
Comparative example 1
The production process of the polyester fine denier yarn comprises the following steps:
s1, leading out the pre-oriented yarn through a yarn-forming frame, entering a yarn cutter, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twisting stopper for heating to obtain heat treatment yarn; wherein, the pre-oriented yarn is purchased from Tung Kun Heng Chao, and the model is C-1040260361;
wherein the draft multiple is 1.58, and the temperature of the deformation hot box is 155 ℃;
s2, cooling the heat-treated yarn through a yarn guide into a cooling plate, and then twisting and untwisting the heat-treated yarn through a false twister to obtain a false twisted yarn; wherein the D/Y ratio of the false twister is 1.6;
s3, feeding the false-twist yarn into a two-roller through a yarn guide, screening through a network device, shaping through an auxiliary roller and a lower hot box, oiling, and winding to form to obtain a fine denier yarn;
wherein the speed of the two rollers is 600m/min, the temperature of the lower hot box is 140 ℃, and the pressure of the network device is 1.5bar.
Performance detection
The performance of the fine denier filaments in each of examples and comparative example 1 was tested, see in particular the following table.
Table 2 test results of example 1-example 5, comparative example 1
| Category(s) | Example 1 | Example 2 | Example 3 | Example 4 | Example 5 | Comparative example 1 |
| Condition of broken filament | Less quantity | Very few | Less quantity | Less and less | Less and less | Multiple ones |
| Wire breakage rate (times/h) | 1 | 0 | 1 | 2 | 1 | 5 |
Description: the fewer, slightly more, more filaments indicate a sequential increase in filaments.
As can be seen from table 2, the filament yarn conditions of the fine denier yarn are significantly improved after the pre-net device is added in examples 1 to 5, and the filament yarn is extremely easily rubbed to generate filament yarn and breakage conditions when the filament yarn passes through the device yarn guide device, and after the pre-net device is added, the cohesion of the filament yarn is enhanced after the filament yarn is subjected to air pressure, so that filament yarn and breakage phenomena are significantly reduced in the subsequent processing procedure.
While in combination with examples 1-5, the capillary condition of the fine denier filaments in examples 4 and 5 is worse than that of examples 1-3, probably because the reasonable setting of the pressure of the pre-network device contributes to the increase of the cohesion of the filament bundle, the pressure is too small to play a role in increasing the cohesion of the filament bundle, and the pressure is too large to increase the friction between the filament bundle and the device, thereby resulting in less improvement of the filament condition of the filament bundle.
Table 3 test results of example 1, example 6-example 10
| Category(s) | Example 1 | Example 6 | Example 7 | Example 8 | Example 9 | Example 10 |
| Condition of broken filament | Less quantity | Very few | Less quantity | Less quantity | Slightly more | Multiple ones |
| Denier (dtex) | 18.9 | 18.2 | 17.3 | 17.1 | 17 | 16.3 |
| Intensity (CN/dtex) | 3.85 | 3.89 | 3.96 | 3.95 | 3.92 | 3.87 |
| Elongation (%) | 26.3 | 25 | 24.3 | 23.7 | 22.6 | 22 |
| Curl shrinkage (%) | 5.5 | 5.9 | 6.5 | 6.7 | 6.8 | 6.9 |
| Crimping stabilizationDegree of certainty (%) | 86.9 | 86 | 85.8 | 85.3 | 85 | 84.9 |
Referring to table 3, as the draft ratio increases, the filaments on the fine denier filaments increase, and when the draft ratio is in the range of 1.62 to 1.66, the filaments are effectively suppressed, and the fine denier filaments also exhibit better strength. Analysis shows that the filament bundle has good trend of internal molecules, and the filament of the fine denier filament is restrained and the strength is improved. If the draft ratio is too high, the filament parts of the filament bundles are easy to break to cause product quality problems such as product broken filaments, tight spots and the like, otherwise, if the draft ratio is too low, the drawing is insufficient, and the trend of molecules in the filament bundles is poor.
Table 4 test results of example 1, example 11-example 15
| Category(s) | Example 1 | Example 11 | Example 12 | Example 13 | Example 14 | Example 15 |
| Condition of broken filament | Less quantity | Less quantity | Less quantity | Slightly more | Very few | Less quantity |
| Wire breakage rate (times/h) | 1 | 0 | 0 | 2 | 0 | 2 |
Referring to table 4, in combination of examples 1 and 11 to 13, the molecular chains are heated to move at a proper temperature, and have good orientation, the internal composition of the filament bundle is changed, the orientation degree of the molecular chains is changed to a certain extent, the temperature is too low, the internal structure of the filament bundle is uneven in density, the crystallization is incomplete, and a good crystal structure and a sufficient orientation structure cannot be formed, so that the filament and broken ends are easy to occur.
When the D/Y ratio was 1.65 in combination with example 1, example 14 and example 15, the hairline could be effectively suppressed; when the D/Y ratio is too high, the friction applied to the tow is increased, and the phenomenon of yarn breakage is liable to occur.
Table 5 test results for example 1, example 16-example 20
| Category(s) | Example 1 | Example 16 | Example 17 | Example 18 | Example 19 | Example 20 |
| CV value (%) | 1.0 | 1.1 | 1.5 | 1.6 | 1.7 | 2.6 |
| Condition of broken filament | Less quantity | Less quantity | Less quantity | Less quantity | Less quantity | Slightly more |
| Wire breakage rate (times/h) | 1 | 1 | 0 | 0 | 1 | 2 |
In combination with table 5, as the production speed increases, the friction of the filament bundle increases, and the situation of broken filaments and ends increases, so that the production speed is controlled within a reasonable range, and the occurrence of the situation of broken filaments and ends is restrained.
Table 6 test results of example 1, example 21-example 25
| Category(s) | Example 1 | Example 21 | Example 22 | Example 23 | Example 24 | Example 25 |
| Condition of broken filament | Less quantity | Very few | Less quantity | Less quantity | Very few | Very few |
| Wire breakage rate (times/h) | 1 | 0 | 0 | 0 | 0 | 0 |
Referring to table 6, the pressure of the network device is set in a proper range, which is beneficial to reducing the occurrence of the phenomena of fuzzing and broken ends. The temperature of the lower hot box has small influence on broken filaments and ends in a proper range, and proper temperature rise can be beneficial to increasing cohesion and bundling property of the filament bundles, so that broken filaments and ends can be reduced to a certain extent.
Table 7 test results of example 1, example 26-example 29
| Category(s) | Example 1 | Example 26 | Example 27 | Example 28 | Example 29 |
| Condition of broken filament | Less quantity | Very few | Very few | Very few | Less quantity |
| Wire breakage rate (times/h) | 1 | 0 | 0 | 0 | 0 |
Referring to table 7, the spiral carbon nanofiber and the hydroxylated graphene are compounded, so that the cohesion of the filament bundle can be effectively improved, and the occurrence of broken filaments and broken ends is greatly reduced.
The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.
Claims (9)
1. The production process of the polyester fine denier yarn is characterized in that: the method comprises the following steps:
s1, leading out the pre-oriented yarn through a yarn frame, passing through a yarn cutter, passing through a pre-network, and then conveying the pre-oriented yarn to a deformation hot box through a roller and a twist stop device to be heated, so as to obtain heat treatment yarn;
s2, obtaining false twisted yarns by heat treatment of the yarns;
s3, obtaining fine denier yarns by false twisting yarns;
wherein the pre-network pressure is 0.2-0.7bar;
preparation of raw material pre-oriented yarn: mixing polyester and spiral carbon nanofiber composite graphene, and obtaining a pre-oriented yarn through melting, extruding, cooling, oiling and winding;
the preparation of the spiral carbon nanofiber composite graphene is as follows: dissolving dopamine hydrochloride in an alkaline aqueous solution, adding the spiral carbon nanofiber, carrying out ultrasonic oscillation, heating for reaction, and centrifuging to obtain the polydopamine-coated spiral carbon nanofiber;
mixing the polydopamine coated spiral carbon nanofiber with a silane coupling agent solution containing epoxy groups, heating for reaction, then adding the hydroxylated graphene, and centrifuging after the reaction to obtain the spiral carbon nanofiber composite graphene.
2. The process for producing polyester fine denier yarn according to claim 1, characterized in that: in step S1, the heating temperature of the deformation hot box is 165-175 ℃.
3. The process for producing polyester fine denier yarn according to claim 1, characterized in that: in the step S1, the draft multiple is 1.62-1.66 before the tows enter the deformation hot box.
4. The process for producing polyester fine denier yarn according to claim 1, characterized in that: and S2, cooling the heat-treated yarn in a cooling plate through a yarn guide, and then feeding the heat-treated yarn in a false twister to obtain the false twisted yarn.
5. The process for producing polyester fine denier yarn according to claim 4, characterized in that: the D/Y ratio of the false twister is 1.6-1.7.
6. The process for producing polyester fine denier yarn according to claim 1, characterized in that: and S3, the false-twist yarn enters a two-roller through a yarn guide, and then is wound and formed after passing through a network device, an auxiliary roller, a lower hot box and oiling, so as to obtain the fine denier yarn.
7. The process for producing polyester fine denier yarn according to claim 6, characterized in that: the speed of the two rollers is 600-650m/min.
8. The process for producing polyester fine denier yarn according to claim 6, characterized in that: the temperature of the lower hot box is 155-185 ℃.
9. The process for producing polyester fine denier yarn according to claim 6, characterized in that: the network pressure is 1.5-1.7bar.
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