CN108796718B - Super-imitation cotton polyester-polyamide air-jet textured mixed filament yarn and preparation method thereof - Google Patents

Abstract

Translated fromChinese

本发明公开了一种超仿棉涤锦空喷变形混纤丝及其制备方法。在同一台机器上将改性共混涤纶与锦纶6分别以不同速率超喂方式同时输入涡流空喷变形组合装置，使进入空喷喷嘴紊流室中的丝束被形成的超音速双向三维涡流空喷紊流气流吹击，发生分离，并在涡流空喷紊流中激烈地移动和回转，再与涡流喷射气流一起连续地从涡流紊流区泄出，形成无规则缠绕交络混纤，制得超仿棉涤锦空喷变形混纤丝。本发明具有工艺流程短、能耗低、生产效率高、成本低，附加值高，产品质量好等优点；制备的超仿棉涤锦混纤丝产品具有与天然棉纤维相似的外观、良好的蓬松性和回弹性，以及优良的吸湿导湿和透气性能。

The invention discloses a super-cotton-like polyester nylon air-sprayed deformed mixed filament yarn and a preparation method thereof. On the same machine, the modified blended polyester and nylon 6 are respectively fed into the vortex air jet deformation combined device at different rates overfeeding, so that the tow entering the turbulence chamber of the air jet nozzle is formed into a supersonic bidirectional three-dimensional eddy current. The air jet turbulent airflow blows, separates, moves and rotates violently in the vortex air jet turbulence, and then continuously leaks out from the vortex turbulence area together with the vortex jet air to form irregularly intertwined and intertwined fibers. The super-imitation cotton polyester brocade air-sprayed textured mixed filament was obtained. The invention has the advantages of short technological process, low energy consumption, high production efficiency, low cost, high added value, good product quality and the like; Bulkiness and resilience, as well as excellent moisture absorption, moisture conduction and breathability.

Description

Super-imitation cotton polyester-polyamide air-jet textured mixed filament yarn and preparation method thereof

Technical Field

The invention relates to the technical field of functional difference fiber manufacturing, in particular to a super-imitation cotton polyester-nylon air-jet texturing mixed filament yarn produced by an air-jet texturing process and a preparation method thereof.

Background

The super cotton-like polyester-polyamide air-jet textured mixed filament yarn is a novel functional type differential fiber material, emphasizes that the surface form and the fabric style of the fiber are similar to those of cotton fabrics, and more importantly, the fabric product has the performance and function of reaching the super cotton-like effect. Meanwhile, the super cotton-like technology attaches more importance to the integration and the exertion of various differentiation and functional technologies and emphasizes the mutual fusion of polymerization, spinning, weaving and dyeing and finishing technologies. Since 2000, the european and japanese have developed so-called "polyester cotton-like running fabrics" that can improve the appearance of fibers and fabrics, such as CoolDry polyester fabrics successfully developed by the eastern ocean spinning of japan, I-COOL series fibers developed by the eastern trade company, and have a good look (1ook good), an excellent appearance, and a good feel (feeling good), and a high-simulation of multifunctional combination is a new stage of development of high-simulation new synthetic fiber fabric products with high-fine fibers as a main body. In China, the super cotton-like fiber and products are listed as textile raw material science and technology items which are key in attack and popularization by the Chinese textile industry union, and the aim is to modify the chemical fiber with the largest yield and the widest application into the textile raw material which is comfortable to wear and has the performance close to or even superior to that of the natural cotton fiber through physical and chemical modification, so that the wearability of the chemical fiber raw material is fundamentally improved, the high performance, functionalization and high added value of the textile are improved, the problem of insufficient cotton supply is solved, the breakthrough of the key common technology of the cotton-like fiber products is realized, and the super cotton-like polyester mixed fibril is finally used for replacing the natural cotton fiber.

At present, the processing technology of super cotton-like terylene adopted at home and abroad is mainly implemented by adopting a single differentiation technology or a single functional physical modification method such as superfine denier, hollow micropore, special-shaped section, mixed fiber composite and chemical modification method such as hydrophilic group graft copolymerization and hydrophilic compound coating treatment, and the fiber is endowed with a certain cotton-like function. However, the processing method has many disadvantages such as complex processing procedure, high production cost, poor quality and single function, and the product prepared by the preparation method has obvious disadvantages especially in the aspects of moisture absorption, ventilation and moisture retention, and the fabric surface prepared by the method has uneven color spots and white spots, and the product quality is unstable, so that the technical problems of the preparation method and the process of the product are urgently needed to be solved.

Disclosure of Invention

Aiming at the defects of the existing super cotton-like polyester processing technology by adopting a single differentiation technology or a single functional physical modification technology, the invention provides the super cotton-like polyester air-jet texturing mixed filament yarn and the preparation method thereof, wherein the super cotton-like polyester air-jet texturing mixed filament yarn has the advantages of short process flow, high production efficiency, low energy consumption, low cost, product performance similar to natural cotton fiber in appearance, fluffiness, good rebound resilience, good moisture absorption, moisture conduction and air permeability and the like.

In order to achieve the aim, the technical scheme adopted by the invention is to provide a preparation method of the super cotton-like polyester-nylon air-jet textured mixed filament yarn, which takes modified blended polyester filament yarn and nylon-6 filament yarn as raw materials, and simultaneously inputs the modified blended polyester filament yarn into an eddy air-jet textured combined device at an overfeed rate of 12-16% and the nylon-6 filament yarn at an overfeed rate of 23-27% on the same polyester-nylon air-jet textured mixed filament machine to form irregular winding and interlacing mixed filament; then the super cotton-like polyester-polyamide air-jet texturing mixed filament yarn is prepared at a winding overfeed rate of-7.0 to-11.0 percent and a processing speed of 400 to 500 m/min;

the vortex air-jet deformation combination device adopted in the technical scheme of the invention comprises a nozzle core and a nozzle shell, and the structure of the combination device is as follows: a circular hole is formed in the nozzle shell, and a compressed air inlet is formed in the nozzle shell; the outer wall of the nozzle core is cylindrical, the nozzle core is fixed at the center of an inner circular hole of the nozzle shell, an annular gap between the outer wall of the nozzle core and the inner circular hole wall of the nozzle shell forms an annular cavity of the air jet nozzle, and the distance between the annular gaps is 3.5-4.0 mm; the middle of the nozzle core is provided with a nozzle core hole, the lower end of the nozzle core hole is in a splayed convergence shape, the middle section of the nozzle core hole is cylindrical to form an air-jet nozzle turbulent flow chamber, the upper end of the nozzle core hole is in a horn-shaped opening, and the wall of the nozzle core corresponding to the middle section of the nozzle core hole is provided with 3-6 air-jet airflow jet micropores which are inclined to the horizontal plane and are in a splayed convergence shape; the annular cavity of the air spray nozzle is communicated with the turbulent chamber of the air spray nozzle through the air spray airflow air injection micropores.

The invention discloses a preferable scheme for preparing super cotton-like polyester-nylon air-jet textured combined filament yarn, which comprises the following steps: the air injection pressure of a nozzle of a compressed air inlet of the vortex air injection deformation combination device is 8.5 bar-10.5 bar.

The technical scheme of the invention also comprises the ultra-cotton-like polyester-nylon air-jet textured mixed filament yarn obtained by the preparation method.

The provided cotton-like polyester-nylon air-jet textured mixed filament yarn has the breaking strength of more than or equal to 2.00cN/dtex, the elongation at break of more than or equal to 18 percent and the boiling water shrinkage of 9 to 11 percent.

The principle of the invention is as follows: the modified blended polyester filament and thenylon 6 filament are respectively and simultaneously input into a vortex air-jet deformation combination device in an overfeed mode at different speeds on the same machine, tows entering a turbulence chamber of an air-jet nozzle are blown by formed supersonic two-way three-dimensional vortex air-jet turbulent air flow in a cavity of a nozzle core with a specific shape to be separated, and are violently moved and rotated in the two-way three-dimensional vortex air-jet turbulent air flow, and then are continuously discharged from a vortex turbulence area together with the vortex air-jet airflow to form irregular winding and interlacing mixed fibers, so that the ultra-cotton-like polyester-nylon air-jet deformation mixed fiber is prepared.

Compared with the prior art, the invention has the beneficial effects that:

1. the invention adopts the technology and the method for producing the super cotton-like polyester-nylon air-jet textured mixed filament yarn, the modified blended polyester filament yarn and the nylon-6 filament yarn are respectively and simultaneously input into a bidirectional three-dimensional vortex air-jet textured combination device in a mode of overfeeding at different speeds on the same machine, the tow entering a turbulence chamber of an air jet nozzle is blown by formed supersonic speed bidirectional three-dimensional vortex air-jet turbulent airflow to be separated, and the tow is violently moved and rotated in the three-dimensional vortex air-jet turbulent airflow and then continuously discharged from a vortex turbulent flow region together with the vortex air-jet airflow to form irregular winding interlacing mixed fiber, and the super cotton-like polyester-nylon air-jet textured mixed filament yarn is prepared.

2. The invention provides a method and a process technology for producing super cotton-like polyester-nylon air-jet textured mixed filament yarn by respectively placing modified blended polyester filament yarn and nylon-6 filament yarn on the same machine to carry out bidirectional three-dimensional vortex air-jet texturing, and has the advantages of short process flow, high production efficiency, low energy consumption, low cost, good product quality, obvious cost performance advantage and the like.

3. The super cotton-like polyester-nylon air-jet textured mixed filament yarn prepared by the invention has the advantages of appearance, fluffiness, good rebound resilience, good moisture absorption, moisture conduction and air permeability and the like similar to natural cotton fiber, and is expected to exceed the performance and function of the natural fiber.

Drawings

FIG. 1 is a process flow chart for preparing a super cotton-like polyester-nylon air-jet textured combined filament yarn provided by the embodiment of the invention;

FIG. 2 is a schematic cross-sectional structure diagram of a bidirectional three-dimensional vortex air-jet texturing combination device provided by an embodiment of the present invention;

FIG. 3 is an electron micrograph of the surface morphology of the super cotton-like polyester-nylon combined filament prepared by the example of the invention.

In the figure: 1. a nozzle core; 2. a nozzle housing; 3. a compressed air inlet; 4. air jet flow air injection micropores; an air injection nozzle turbulence chamber; 6. and an annular cavity of the air spray nozzle.

Detailed Description

The technical scheme of the invention is further explained by combining the drawings and the embodiment.

Example 1

The embodiment provides a method for producing an ultra-cotton-like polyester-nylon air-jet textured mixed filament yarn with the specification of 167dtex/96f, and the process flow of the method is shown in the attached figure 1.

The production process conditions are as follows: the modified blended polyester filament and the nylon-6 filament are respectively and simultaneously input into a bidirectional three-dimensional vortex air-jet deformation combination device in different speed overfeeding modes on the same machine, the tows entering a turbulence chamber of an air-jet nozzle are blown by formed supersonic speed bidirectional three-dimensional vortex air-jet turbulent air flow to be separated, and are violently moved and rotated in the bidirectional three-dimensional vortex air-jet turbulent air flow, and then are continuously discharged from a vortex turbulence area together with the vortex air-jet airflow to form irregular winding and interlacing mixed fibers, so that the ultra-cotton-like polyester-nylon air-jet deformation mixed fiber is prepared.

Referring to fig. 2, it is a schematic cross-sectional structure diagram of the bidirectional three-dimensional vortex air-jet deformation combination device provided in this embodiment; the nozzle comprises anozzle core 1 and anozzle shell 2, wherein the nozzle shell is made of copper alloy materials, and the nozzle core is made of composite ceramic materials. The structure is as follows: the nozzle core is fixed at the center of the inner circular hole of the nozzle shell, and an annular gap between the outer wall of the nozzle core and the inner circular hole wall of the nozzle shell forms an emptynozzle ring cavity 6; acompressed air inlet 3 is arranged on the nozzle shell; the middle of the nozzle core is provided with a nozzle core hole, the lower end of the nozzle core hole is in a splayed convergence shape, the middle section of the nozzle core hole is cylindrical to form an air-jet nozzleturbulent flow chamber 5, the upper end of the nozzle core hole is in a horn-shaped opening, and the wall of the nozzle core corresponding to the middle section of the nozzle core hole is provided with four air-jet flow air-jet micropores 4 which are inclined to the horizontal plane and are in a splayed convergence shape; theannular cavity 6 of the air spray nozzle is communicated with theturbulent chamber 5 of the air spray nozzle through the air spray airflow air-spraying micropores 4; the air inlets of the air jet flowair injection micropores 4 and thecompressed air inlet 3 are arranged on the same horizontal plane. When the air jet nozzle is in a working state, compressed air enters an airjet nozzle cavity 6 between the outer wall of the nozzle core and the inner circular hole wall of the nozzle shell through acompressed air inlet 3 to form air jet flow, and enters the inside of thenozzle core 1 through four air jet flowair jet micropores 4 to form an air jet nozzleturbulent flow chamber 5. In this embodiment, the annular gap between the outer wall of the nozzle core and the inner circular bore wall of the nozzle housing was set at a spacing of 3.8 mm.

The main technological parameters are as follows:

the specification of the polyester-nylon air-jet textured combined filament yarn is as follows: the specification of the modified blended polyester filament is 75dtex/48f, and the specification of thenylon 6 filament is 73dtex/48 f;

the main process of polyester-nylon air-jet texturing mixed fiber comprises the following steps: the first overfeed rate is 13 percent, the second overfeed rate is 24 percent, the annular gap distance of the air spray nozzle is 3.8mm, the air spray pressure of the nozzle is 9.20 bar, the third overfeed rate is-8.3 percent, and the processing speed is 430 m/min.

The specification of the ultra-cotton-like polyester-nylon air-jet textured combined filament yarn prepared according to the process conditions is 160dtex/96f, the breaking strength is 2.46cN/dtex, the elongation at break is 19.8%, and the boiling water shrinkage is 10.3%.

Referring to fig. 3, it is a surface morphology electron micrograph of the super cotton-like polyester-nylon hybrid fiber prepared in this example; as can be seen from figure 3, the formed combined filament yarn is in a random winding interlacing shape, and the obtained super cotton-like polyester-nylon air-jet textured combined filament yarn has a stable and bulky filament loop shape effect.

Example 2

The embodiment provides a method for producing super cotton-like polyester-nylon air-jet textured mixed filament yarn with the specification of 180dtex/96f, and the process flow of the method is shown in the attached figure 1; the adopted bidirectional three-dimensional vortex air-jet deformation combined device is shown in figure 2. The production process conditions are as follows:

the modified blended polyester filament and the nylon-6 filament are respectively and simultaneously input into a bidirectional three-dimensional vortex air-jet deformation combination device in different speed overfeeding modes on the same machine, the tows entering a turbulence chamber of an air-jet nozzle are blown by formed supersonic speed bidirectional three-dimensional vortex air-jet turbulent air flow to be separated, and are violently moved and rotated in the bidirectional three-dimensional vortex air-jet turbulent air flow, and then are continuously discharged from a vortex turbulence area together with the vortex air-jet airflow to form irregular winding and interlacing mixed fibers, so that the ultra-cotton-like polyester-nylon air-jet deformation mixed fiber is prepared. The main technological parameters are as follows: the specification of the polyester-nylon air-jet textured combined filament yarn is as follows: the specification of the modified blended polyester filament is 83dtex/48f, and the specification of thenylon 6 filament is 82dtex/48 f; the main process of polyester-nylon air-jet texturing mixed fiber comprises the following steps: the first overfeed rate is 15 percent, the second overfeed rate is 26 percent, the annular gap distance of the air spray nozzle is 3.8mm, the air spray pressure of the nozzle is 9.50 bar, the third overfeed rate is-9.5 percent, and the processing speed is 480 m/min; the specification of the ultra-cotton-like polyester-nylon air-jet textured combined filament yarn is 180dtex/96f, the breaking strength is 2.35cN/dtex, the elongation at break is 20.4%, and the boiling water shrinkage is 10.5%.

Example 3

The embodiment provides a method for producing super cotton-like polyester-nylon air-jet textured mixed filament yarn with the specification of 180dtex/120f, and the process flow of the method is shown in the attached figure 1; the adopted bidirectional three-dimensional vortex air-jet deformation combined device is shown in figure 2. The production process conditions are as follows:

the modified blended polyester filament yarn and the nylon-6 filament yarn are respectively and simultaneously input into the three-dimensional vortex air-jet texturing combination device provided by theembodiment 1 in different speed overfeeding modes on the same machine, and are subjected to bidirectional three-dimensional vortex air jet, so that the filament bundle entering a turbulence chamber of an air jet nozzle is blown by formed supersonic speed three-dimensional vortex air-jet turbulent air flow to be separated, and the filament bundle is violently moved and rotated in the bidirectional three-dimensional vortex air-jet turbulent air flow, and then continuously discharged from a vortex turbulence area together with the vortex jet air flow to form irregularly wound and interlaced mixed fibers, and the ultra-cotton-like polyester-nylon air-jet textured mixed fiber is prepared. The main technological parameters are as follows: the specification of the polyester-nylon air-jet textured combined filament yarn is as follows: the specification of the modified blended polyester filament is 83dtex/72f, and the specification of thenylon 6 filament is 82dtex/48 f; the main process of polyester-nylon air-jet texturing mixed fiber comprises the following steps: the first overfeed rate is 14 percent, the second overfeed rate is 25 percent, the annular gap distance of the air spray nozzle is 3.8mm, the air spray pressure of the nozzle is 9.0 bar, the third overfeed rate is-9.1 percent, and the processing speed is 460 m/min; the specification of the ultra-cotton-like polyester-nylon air-jet textured combined filament yarn is 180dtex/120f, the breaking strength is 2.53cN/dtex, the elongation at break is 18.5%, and the boiling water shrinkage is 9.7%.

Example 4

Typically, the wicking height is used to characterize, measure and compare the moisture absorption performance of different fibers or textiles, and the super cotton-like polyester-nylon air-jet textured co-mingled filaments provided in examples 1, 2 and 3 of the present invention are separately tested for wicking height and compared to a pure cotton yarn.

Wicking Performance test method according to ZBW04019-90 textile capillary effect test method, the combined filament yarn was vertically suspended, one end was immersed in liquid, and the rise height of the liquid along the sample (wicking height) within 30 minutes was measured, and the results of the test of the wicking performance of the ultra-cotton-like polyester/nylon air-jet textured combined filament yarn and the pure cotton yarn fiber were as follows:

the wicking heights of the super cotton-like polyester-nylon air-jet textured combined filament yarns provided in examples 1, 2 and 3 are 10.5cm, 10.7cm and 11.0cm respectively; the wicking height of the pure cotton yarn was 0.8 cm.

The test result shows that: the wicking height of the super cotton-like polyester-nylon air-jet textured combined filament yarn provided by the invention is obviously higher than that of pure cotton yarn, which shows that the hygroscopicity of the super cotton-like polyester-nylon air-jet textured combined filament yarn is better than that of the pure cotton yarn.

Claims (4)

Translated fromChinese

1.一种超仿棉涤锦空喷变形混纤丝的制备方法，其特征在于：以改性共混涤纶长丝和锦纶6长丝为原料，在同一台涤锦空喷变形混纤机器上，将改性共混涤纶长丝以12%～16%的超喂率，锦纶6长丝以23%～27%的超喂率同时输入涡流空喷变形组合装置，形成无规则缠绕交络混纤；再以-7.0%～-11.0%的卷绕超喂率，400m/min～500m/min的加工速度，制得超仿棉涤锦空喷变形混纤丝；所述涡流空喷变形组合装置为三维涡流空喷变形组合装置；1. a preparation method of super-imitation cotton polyester brocade air-sprayed deformed mixed filament, it is characterized in that: with modified blended polyester filament and polyamide 6 long filament as raw material, in the same polyester brocade air-sprayed deformed mixed fiber machine At the same time, the modified blended polyester filament is fed into the vortex air-jet deformation combined device at an overfeed rate of 12% to 16% and nylon 6 filament at an overfeed rate of 23% to 27% to form a random intertwining. Mixing fibers; and then at a winding overfeed rate of -7.0% to -11.0% and a processing speed of 400m/min to 500m/min, the super-cotton-like polyester nylon air-jet deformed mixed fiber is prepared; the eddy current air-jet deformed The combined device is a three-dimensional vortex air jet deformation combined device;所述的涡流空喷变形组合装置，包括喷嘴芯（1）和喷嘴外壳（2）；喷嘴外壳的内部开有圆孔，喷嘴外壳上开有压缩空气进气口（3）；喷嘴芯的外壁为圆柱状，喷嘴芯固定于喷嘴外壳的内部圆孔中心，喷嘴芯的外壁与喷嘴外壳的内部圆孔壁之间的环形缝隙形成空喷喷嘴环形腔（6），其环形缝隙的间距为3.5mm～4.0mm；喷嘴芯的中间开有嘴芯孔，嘴芯孔的下端呈“八”字收敛状，嘴芯孔的中段呈圆柱状，形成空喷喷嘴紊流室（5），嘴芯孔的上端呈喇叭形开口，喷嘴芯对应于嘴芯孔中段的壁上开有3～6个倾斜于水平面、呈“八”字收敛状的空喷气流喷气微孔（4）；空喷喷嘴环形腔（6）通过空喷气流喷气微孔（4）与空喷喷嘴紊流室（5）贯通。The vortex air jet deformation combined device comprises a nozzle core (1) and a nozzle casing (2); a circular hole is formed in the nozzle casing, and a compressed air inlet (3) is formed on the nozzle casing; the outer wall of the nozzle core It is cylindrical, the nozzle core is fixed at the center of the inner circular hole of the nozzle shell, and the annular gap between the outer wall of the nozzle core and the inner circular hole wall of the nozzle shell forms an annular cavity (6) for the empty spray nozzle, and the spacing between the annular gaps is 3.5 mm～4.0mm; there is a nozzle core hole in the middle of the nozzle core, the lower end of the nozzle core hole is in the shape of "eight" converging, and the middle section of the nozzle core hole is cylindrical, forming an empty jet nozzle turbulence chamber (5). The upper end of the hole has a trumpet-shaped opening, and the wall of the nozzle core corresponding to the middle section of the nozzle core hole is provided with 3 to 6 air jet micro-holes (4) inclined to the horizontal plane and in the shape of "eight" converging; The annular cavity (6) communicates with the air-jet nozzle turbulence chamber (5) through the air-jet air-jet micro-holes (4).2.根据权利要求1所述的一种超仿棉涤锦空喷变形混纤丝的制备方法，其特征在于：进入涡流空喷变形组合装置的压缩空气进气口（3）的喷嘴空喷压力为8.5 bar～10.5 bar。2 . The method for preparing a super-cotton imitation cotton polyester nylon air-jet deformed mixed filament yarn according to claim 1, characterized in that: the nozzle of the compressed air inlet (3) entering the vortex air-jet deformation combination device is air-jetted The pressure is 8.5 bar to 10.5 bar.3.一种按权利要求1制备方法得到的超仿棉涤锦空喷变形混纤丝。3. A super-imitation cotton polyester brocade air-jet deformed mixed filament yarn obtained by the preparation method of claim 1.4.根据权利要求3所述的一种超仿棉涤锦空喷变形混纤丝，其特征在于：它的断裂强度≥2.00cN/dtex，断裂伸长率≥18%，沸水收缩率为9%～11%。4. A kind of super imitation cotton polyester nylon air-jet deformed mixed filament yarn according to claim 3, characterized in that: its breaking strength≥2.00cN/dtex, breaking elongation≥18%, and boiling water shrinkage rate of 9 % to 11%.

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