CN114293303A - Preparation method of high-fluffiness high-strength DTY - Google Patents
Preparation method of high-fluffiness high-strength DTY Download PDFInfo
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- CN114293303A CN114293303A CN202210006927.0A CN202210006927A CN114293303A CN 114293303 A CN114293303 A CN 114293303A CN 202210006927 A CN202210006927 A CN 202210006927A CN 114293303 A CN114293303 A CN 114293303A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
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- 241001589086 Bellapiscis medius Species 0.000 claims description 14
- 238000004804 winding Methods 0.000 claims description 14
- 230000009471 action Effects 0.000 claims description 8
- 239000010985 leather Substances 0.000 claims description 8
- 238000009998 heat setting Methods 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 6
- 239000004952 Polyamide Substances 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 4
- 229920002647 polyamide Polymers 0.000 claims description 4
- 238000003908 quality control method Methods 0.000 claims description 4
- 239000010959 steel Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 description 23
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- 230000000052 comparative effect Effects 0.000 description 5
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- 230000009286 beneficial effect Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
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- 229920006052 Chinlon® Polymers 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- 238000011144 upstream manufacturing Methods 0.000 description 1
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Abstract
The invention discloses a preparation method of DTY with high fluffiness and high strength, which is characterized in that after a network nozzle is modified from an FR2A shaft, the speed of the FR2A shaft is higher than that of an FR2 shaft, namely DTY tows which are false-twisted are pulled apart (cold-drawn) through speed difference, and after the pulled DTY tows are relaxed, single fibers are not twisted with each other, so that the yarns keep high fluffiness. And then heat-set in a second heat box H2 to increase the stability of the bulkiness of the DTY tow. And different network styles of the yarns can be realized by adjusting the speed difference between the FR2A shaft and the FR3 shaft. The DTY with high strength and high fluffiness is produced.
Description
Technical Field
The invention belongs to the technical field of spinning, and particularly relates to a preparation method of high-bulkiness and high-strength DTY.
Background
With the gradual improvement of domestic living standard, the requirements of people on clothes are higher and higher, and the continuously improved requirements of consumption terminals also force the process of upstream production to be advanced all the time. Most of products produced by chinlon elasticizing are used for clothes and accessories, and most of the products are applied to underwear. The comfort and softness of the garment made of DTY are directly related to the breaking strength and bulkiness of the DTY. The direct factor affecting the fracture strength and fluffiness index of DTY is the production equipment and the production process. At present, most of nylon DTY products in the market have the strength of 2.8-4.0cn/dtex, moderate bulkiness, and can not completely meet the high requirements of customers at present, and the nylon DTY products mainly show the following points:
(1) the breaking strength is between 2.8 and 4.0cn/dtex, the strength is far lower than the index of high-strength yarn, and the fluffing, pilling, abrasion, hole breaking and the like of the clothes are easily caused.
(2) The fluffiness is unstable and can not be kept for a long time, and the fluffiness is easy to change due to the change of the external physical environment, so that the clothes are worn for a plurality of times, and the hand feeling becomes hard after the clothes are washed for a plurality of times, thereby causing the clothes to be uncomfortable to wear.
(3) When the fluffiness is judged by a client, the fluffiness is often compared by visual inspection and hand feeling, and the fluffiness of the DTY yarn cannot be really reflected, so that the adjustment of the production process is disturbed.
(4) The product index does not reach the standard, so that a large amount of customer orders are lost, and huge economic loss is caused to a company.
(5) If a product which accords with high strength and high fluffiness is required to be made, the practical special elasticizing equipment, the high-quality fittings and the like are added, so that the production cost is high, and the company is not facilitated to operate.
In order to solve the problems, the invention adopts Japanese TMT-ATF-1500 type elasticizing equipment, DTY with high strength and high fluffiness is produced by researching the characteristics of DTY products and carrying out a boldly innovative process test, and the process is also suitable for testing and comparing other products with various specifications.
Disclosure of Invention
The invention aims to provide a production process of DTY with high fluffiness and high strength.
In order to achieve the purpose, the invention adopts the following technical scheme:
old/conventional process: (figure 1) the network nozzle is arranged between FR2 and FR2A, the shaft speed of FR2A is less than the shaft speed of FR2, and the slack state of the yarn section is maintained, so that the network nozzle can be guaranteed to spray the yarn onto the network node (if the speed of FR2A is greater than the speed of FR2, the yarn is tight, the network nozzle cannot spray the network node, and the network yarn cannot be produced). The yarns between FR2A and FR3 can keep the loose and tight state of the yarns according to the style of the yarns and realize heat setting through the temperature of an H2 hot box.
The invention has the innovative process that: (figure 2) after the network nozzle is modified from an FR2A shaft, the speed of the FR2A shaft is greater than that of an FR2 shaft, namely, DTY tows which are false-twisted are pulled apart (cold-drawn) through a speed difference, and after the pulled DTY tows are relaxed, single fibers are not mutually twisted, so that the yarn keeps high fluffiness. (the state of the drawn DTY tow was observed by hand) and then heat set in a second heat box H2 to increase the bulk stability of the DTY tow. And different network styles of the yarns can be realized by adjusting the speed difference between the FR2A shaft and the FR3 shaft.
Specifically, the production process of the DTY with high fluffiness and high strength comprises the following steps:
(1) the polyamide fiber-POY fiber is placed on a raw silk frame of an elasticizer, the silk strands enter a first roller FR1 through a silk guide pipe and a silk guide, the axial speed is 300-600m/min, and the silk strands are heated at the temperature of 150-200 ℃ through a deformation hot box H1 of the elasticizer to be vitrified so as to generate deformation;
(2) the heated filament is cooled by a cooling plate and then enters a false twister, and the false twister enables the passing filament to generate twisting and untwisting deformation through the combination of an inlet disc, a working disc and an outlet disc through rotation, so that the filament bundle is fluffy;
(3) the tows processed by the false twister enter a second roller FR2 after passing through a tension sensor, the tension sensor detects and records untwisting tension of the tows in real time, quality control is facilitated, and the untwisting tension T2 is 10-27 g;
(4) when the tows enter a second roller FR2, 2-3 circles of tows are wound between a leather roller and a godet roller, and the inclination of the godet roller can lead the wound yarns to be naturally separated without twisting; the second shaft FR2 has the shaft speed of 400-950m/min and the shaft speed difference ratio of FR2 to FR1 of 0.6-1.9;
(5) after passing through the second roller, the tows directly enter a second auxiliary roller FR2A, the axial speed of a second shaft FR2A is 450-minus 800m/min, the axial speed of FR2A is greater than the axial speed of FR2, and the yarns are tightened between the second auxiliary roller FR2A and the second roller FR2, so that the tows after false twisting are straightened, and the mutual twisting among single fibers is reduced;
(6) after the tows come out of FR2A, the tows directly enter a network nozzle, and after the tows pass through the network nozzle, DTY network yarns with different network styles are generated under the action of compressed air of the nozzle, or the compressed air is closed to generate non-network yarns;
(7) the tows after passing through the network nozzle enter a second hot box H2, the temperature of H2 is 50-200 ℃, and the tows are subjected to heat setting in a non-contact heating mode, so that the shape of the tows is more stable;
(8) after the tows come out of the H2, the direction of the tows is changed through the action of the filament guide, and then the tows enter a third roller FR 3;
(9) after the tows enter a third roller FR3, the tows are enabled to pass between a leather roller and a steel roller of the third roller FR3 in a direct pressing mode, the axial speed of the third shaft FR3 is 560-;
(10) the tows enter an oiling device after passing through a third roller FR3, and the rotating speed of the oiling roller is 0.2-1.2 rpc/min;
(11) after oil is added by an oil tanker, the tows enter a winding device for winding and forming, and the winding speed is 580 and 880 m/min.
The invention has the following remarkable advantages:
the production process is mainly different from the conventional process, and adopts a cold drawing and hot setting process of drawing the DTY before winding and then carrying out hot setting through a second hot box in the working procedure, so that the conventional POY is used for producing the DTY with high fluffiness and high strength.
The process has the advantages that:
1. the yarn strength is higher;
2. the filling power of the finished yarn is better, and the cloth cover is softer;
3. the lace market is more popular, and the market expansion space is large.
The innovative process principle and the process principle diagram are as follows:
(1) the cold drawing and hot setting process is adopted between the front of the winding area and the back of the nozzle, so that the strength of the yarn is improved, and the stability of the fluffiness is improved: cold drawing, the further drawing of yarn after the false twist, make intensity grow, make every fibre loose again, reduce the not enough yarn shrivelled that leads to of crimp that twines each other between the single fiber and lead to "shriveling", in the hot setting region, make the yarn lax state for the yarn crimp state obtains abundant design, in order to do benefit to the long-term maintenance in later stage.
(2) The physical form of the synthetic fibers, if altered, must be subjected to more severe environmental conditions than before the last change.
(3) The process schematic is shown in fig. 3.
Drawings
FIG. 1 is a flow chart showing the operation of a conventional process of comparative example 1;
FIG. 2 is a flow chart of the operation of the inventive process of example 1;
FIG. 3 is a process schematic of the present invention;
FIG. 4 is a loft effect of the yarn prepared in example 1;
fig. 5 is a graph of the loft effect of the yarn prepared in comparative example 1.
Detailed Description
The technical scheme of the invention is further explained by the specific implementation mode;
various principles and accessories of the present invention are commercially available or may be prepared according to conventional methods in the art, unless otherwise specified.
The invention has the following technological parameters:
theoretical calculation formula of main parameters:
| abbreviation model number | Means of | Formula for calculation |
| YS | Speed of filament | YS＝FR2 |
| DR | Draw ratio | DE＝FR2/FR1 |
| D/Y | Speed ratio | D/Y＝TW/FR2 |
| OF2 | Overfeed rate (%) | 0F2＝(FR2A-FR3)*100/FR2A |
| OF2A | 2A overfeed (%) | OF2A＝(FR2-FR2A)*100/FR2 |
| OF3 | 3 rd overfeed rate (%) | 0F3＝(FR2A-WR)*100/FR2A |
The physical indexes of the finished product made by the improved process are as follows:
70D24F is exemplified by:
breaking strength: 4.9-5.3cn/dtex, (the normal yarn is less than 4.5 cn/dtex);
elongation% 27.9-28.5;
shrinkage% in boiling water: 5.6 plus or minus 0.2;
shrinkage stability in boiling water: 56.8 +/-0.4.
Example 1 Innovative Process, see FIG. 2
The preparation method of the high-bulkiness high-strength DTY of the embodiment comprises the following steps:
(1) putting polyamide fiber-POY fiber on a yarn creel of a texturing machine, and enabling yarn strips to enter a first roller through a yarn guide pipe and a yarn guide, namely FR1, wherein the axial speed is 516 m/min; heating the strand silk by a texturing machine deformation hot box H1 at 180 ℃ to ensure that the strand silk is heated to a vitrification state so as to generate deformation;
(2) the filament yarns heated by the hot box enter the false twister after being cooled by the cooling plate, the false twister enables the passing filament yarns to generate twisting and untwisting deformation through the combination of the leading-in disc, the working disc and the leading-out disc through rotation, the filament bundles are in a fluffy state, the filament bundles are heated by the hot box H1 and then cooled by the cooling plate, and the filament bundles have certain toughness, so that the twisting effect generated by the false twister is conveniently transferred upwards, and the deformation effect of the filament bundles in the hot box is facilitated;
(3) the tows processed by the false twister enter a second roller FR2 after passing through a tension sensor, the tension sensor detects and records untwisting tension of the tows in real time, quality control is facilitated, and the untwisting tension T2 is 27 g;
(4) when the tows enter a second roller FR2, 2-3 circles of tows are wound between a leather roller and a godet roller, and the inclination of the godet roller can lead the wound yarns to be naturally separated without twisting; the second shaft FR2 has a shaft speed of 650m/min, i.e. YS ═ 650m/min, and the shaft speed difference ratio of FR2 and FR1 is 1.26, i.e. DR ═ FR2/FR1 ═ 1.26;
(5) the tows directly enter a second auxiliary roller FR2A after passing through the second roller, the shaft speed OF the second auxiliary roller FR2A is 684m/min, namely OF2 is (FR2A-FR2) 100/FR2 is 5%, the yarns are tightened between the second auxiliary roller FR2A and the second roller FR2, the tows after false twisting are straightened, and mutual twisting among single fibers is reduced;
(6) after the tows come out of FR2A, the tows directly enter a modified and added network nozzle (a network device), DTY network yarns with different network styles are generated through the action of compressed air of the nozzle after the tows pass through the network nozzle, and the compressed air can be closed according to an actual production process to produce non-network yarns;
(7) the tows after passing through the network nozzle enter a second hot box H2, H2 is 100 ℃, and the tows are subjected to heat setting in a non-contact heating mode, so that the form of the tows is more stable (H2 is opened or not opened, the temperature is set, the temperature is related to the requirements of downstream customers, the factor mainly influences the elasticity of the tows and the stability of indexes, and the elasticity of products after being opened with H2 is generally slightly lower);
(8) after the tows come out of the H2, the direction of the tows is changed through the action of a yarn guide device, and then the tows enter an FR3 shaft;
(9) after entering an FR3 shaft, the tows are directly pressed to pass between a leather roller and a steel roller OF FR3, the speed OF the FR3 shaft is 671m/min, namely OF2A is (FR2A-FR 3) 100/FR2A is 1.90%; it can be known from the data that FR3 shaft speed is less than FR2A shaft speed, which causes the tow to form a slack state between the two shafts, and is beneficial to network nozzle work and H2 heat setting;
(10) after passing through FR3, the tows enter an oiling device, and the rotating speed of an oil roller is 0.75 rpc/min;
(11) after oiling by an oil tanker, the tows enter a winding device, the winding speed is 668m/min, namely OF3 is 2.3%, and meanwhile, the tows are mainly wound and formed.
Parameter setting is as follows
| Initial traverse width | 250 | Width of bottom layer of yarn |
| Taper angle | 75 | Side angle of spinning cake |
| Winding angle | 24 | Namely the CA angle |
The DTY product produced by the preparation process has the following physical indexes of breaking strength: 5.1cn/dtex, (conventional yarn 4.5cn/dtex below) elongation%: 27.9; shrinkage% in boiling water: 5.6 plus or minus 0.2; shrinkage stability in boiling water: 56.8 +/-0.4; the oil content is 2.2%. The yarn fluffing effect is shown in figure 4, and the product produced by adopting the cold drawing and hot setting process has the advantages that single fibers are mutually scattered, the bulkiness of the tows is better, and the stability is durable. Comparative example 1-conventional Process, in conjunction with FIG. 1
The method for preparing the conventional DTY of this comparative example comprises the steps of:
(1) putting polyamide fiber-POY fiber on a raw silk frame of a texturing machine, enabling the strand silk to enter a first roller through a yarn guide pipe and a yarn guide, namely FR1, wherein the axial speed is 516m/min, and heating the strand silk by 180 ℃ through a texturing machine deformation hot box H1 to enable the strand silk to be heated to a vitrification state so as to generate deformation;
(2) the filament yarns heated by the hot box are cooled by the cooling plate and then enter the false twister, the false twister is rotated to twist and untwist the filament yarns passing through the combination of the leading-in plate, the working plate and the leading-out plate, so that the filament bundles are fluffy, and the filament bundles are heated by the hot box H1 and then cooled by the cooling plate, have certain toughness, are convenient for the twisting effect generated by the false twister to be transferred upwards, and are beneficial to the deformation effect of the filament bundles in the hot box;
(3) the tows processed by the false twister enter a second roller FR2 after passing through a tension sensor, the tension sensor detects and records untwisting tension of the tows in real time, quality control is facilitated, and the untwisting tension T2 is 27 g;
(4) when the tows enter a second roller FR2, 2-3 circles of tows are wound between a leather roller and a godet roller, and the inclination of the godet roller can lead the wound yarns to be naturally separated without twisting; the second shaft FR2 has a shaft speed of 650m/min, i.e. YS ═ 650m/min, and the shaft speed difference ratio of FR2 and FR1 is 1.26, i.e. DR ═ FR2/FR1 ═ 1.26;
(5) after the tows come out of FR2, the tows directly enter a modified and added network nozzle (a network device), DTY network yarns with different network styles are generated through the action of compressed air of the nozzle after the tows pass through the network nozzle, and the compressed air can be closed according to an actual production process to produce non-network yarns;
(6) after passing through a net nozzle, the tows directly enter a second auxiliary roller FR2A, the shaft speed OF the second auxiliary roller FR2A is 617m/min, namely OF2 is (FR2A-FR2) 100/FR2 is-5%, and the yarns are loosened between the second auxiliary roller FR2A and the second roller FR2, so that the net processing OF the tows is facilitated;
(7) the tows enter a second hot box H2 after coming out of FR2A, H2 is 100 ℃, and the tows are subjected to heat setting in a non-contact heating mode, so that the form of the tows is more stable (H2 is opened or not opened, the temperature is set, the requirements of downstream customers are related, the elasticity and index stability of the tows are mainly influenced by the factors, and the elasticity of products after opening H2 is generally slightly lower);
(8) after the tows come out of the H2, the direction of the tows is changed through the action of a yarn guide device, and then the tows enter an FR3 shaft;
(9) after the tows enter an FR3 shaft, the tows are enabled to pass between a leather roller and a steel roller OF FR3 in a direct pressing mode, the speed OF an FR3 shaft is 607m/min, namely OF2A is (FR2A-FR 3) 100/FR2A is 1.62%, and the FR3 shaft speed is lower than the FR2A shaft speed, so that the tows can be enabled to form a loose state between the FR3 shaft speed and the FR2 shaft speed, and the operation OF a network nozzle and the H2 heat setting are facilitated;
(10) after passing through FR3, the tows enter an oiling device, and the rotating speed of an oil roller is 0.75 rpc/min;
(11) after oiling by a tanker, the tows enter a winding device, and the winding speed is 610m/min, namely OF3 is 1.1%, and meanwhile, the tows are mainly wound and formed.
Parameter setting is as follows
| Initial traverse width | 250 | Width of bottom layer of yarn |
| Taper angle | 75 | Side angle of spinning cake |
| Winding angle | 24 | Namely the CA angle |
The DTY product produced by the preparation process has the following physical indexes of breaking strength: 4.2cn/dtex, (% elongation of conventional yarns 4.5 cn/dtex): 28; shrinkage% in boiling water: 5.0 plus or minus 0.2; shrinkage stability in boiling water: 41.1 plus or minus 0.4; the oil content is 2.2%. The yarn fluffing effect is shown in fig. 5, the yarn produced by the conventional process has obvious crimp, but most of single fibers are mutually twisted, but the whole fluffing property of the yarn is poor, the state stability is reduced along with the links of thick dyeing and finishing, garment making, ironing and the like, and the garment comfort is reduced due to the fact that the yarn is usually 'fixed'.
Comparison of process steps and parameters for example 1 and comparative example 1:
the above description is only a preferred embodiment of the present invention, and all equivalent changes and modifications made in accordance with the claims of the present invention should be covered by the present invention.
Claims (1)
1. A preparation method of DTY with high fluffiness and high strength is characterized by comprising the following steps:
(1) the polyamide fiber-POY fiber is placed on a raw silk frame of an elasticizer, the silk strands enter a first roller FR1 through a silk guide pipe and a silk guide, the axial speed is 300-600m/min, and the silk strands are heated at the temperature of 150-200 ℃ through a deformation hot box H1 of the elasticizer to be vitrified so as to generate deformation;
(2) the heated filament is cooled by a cooling plate and then enters a false twister, and the false twister enables the passing filament to generate twisting and untwisting deformation through the combination of an inlet disc, a working disc and an outlet disc through rotation, so that the filament bundle is fluffy;
(3) the tows processed by the false twister enter a second roller FR2 after passing through a tension sensor, the tension sensor detects and records untwisting tension of the tows in real time, quality control is facilitated, and the untwisting tension T2=10-27 g;
(4) when the tows enter a second roller FR2, 2-3 circles of tows are wound between a leather roller and a godet roller, and the inclination of the godet roller can lead the wound yarns to be naturally separated without twisting; the second shaft FR2 has the shaft speed of 400-950m/min and the shaft speed difference ratio of FR2 to FR1 of 0.6-1.9;
(5) after passing through the second roller, the tows directly enter a second auxiliary roller FR2A, the axial speed of a second shaft FR2A is 450-minus 800m/min, the axial speed of FR2A is greater than the axial speed of FR2, and the yarns are tightened between the second auxiliary roller FR2A and the second roller FR2, so that the tows after false twisting are straightened, and the mutual twisting among single fibers is reduced;
(6) after the tows come out of FR2A, the tows directly enter a network nozzle, and after the tows pass through the network nozzle, DTY network yarns with different network styles are generated under the action of compressed air of the nozzle, or the compressed air is closed to generate non-network yarns;
(7) the tows after passing through the network nozzle enter a second hot box H2, the temperature of H2 is 50-200 ℃, and the tows are subjected to heat setting in a non-contact heating mode, so that the shape of the tows is more stable;
(8) after the tows come out of the H2, the direction of the tows is changed through the action of the filament guide, and then the tows enter a third roller FR 3;
(9) after the tows enter a third roller FR3, the tows are enabled to pass between a leather roller and a steel roller of the third roller FR3 in a direct pressing mode, the axial speed of a third shaft FR3 = 560-;
(10) the tows enter an oiling device after passing through a third roller FR3, and the rotating speed of the oiling roller is =0.2-1.2 rpc/min;
(11) after oil is added by an oil tanker, the tows enter a winding device for winding and forming, and the winding speed =580 and 880 m/min.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114717698A (en) * | 2022-05-06 | 2022-07-08 | 张云云 | Production method of high-bulkiness textured yarn |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114717698A (en) * | 2022-05-06 | 2022-07-08 | 张云云 | Production method of high-bulkiness textured yarn |
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| CN114293303B (en) | 2022-11-08 |
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Address after: 350212 Binhai Industrial Zone, Changle District, Fuzhou City, Fujian Province Patentee after: Fujian Hengshen Synthetic Fiber Technology Co.,Ltd. Country or region after: China Address before: 350218 Binhai Industrial Zone, Changle City, Fuzhou City, Fujian Province Patentee before: CHANGLE HENGSHEN SYNTHETIC FIBER Co.,Ltd. Country or region before: China |