A method for preparing recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber

Abstract

The invention discloses a method for preparing a recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differential fiber, which comprises the following steps: spinning of recyclable and regenerated colored polyester POY, elasticizing of core yarn DTY, and air-changing of ATY. The advantages of the prepared fiber are: it can achieve the effect of cashmere-like, soft, delicate and smooth, full suede, and can also reduce material costs; the composition uses recyclable and regenerated cationic special materials, which can achieve room temperature dyeing; the cationic material not only greatly improves the color absorption performance of the fiber, but also reduces the crystallinity, making it easy for dye molecules to penetrate, making the fiber easy to dye, improving the color absorption rate, and improving the hygroscopicity; through cationic modified multifunctional wool-like, the fabric can also have a soft hand feel, anti-static, anti-pilling, and can be co-dyed with wool at room temperature and pressure; the cation also has a two-color effect; the raw materials are all recyclable and regenerated raw materials, which is beneficial to environmental protection and sustainable development.

Description

Technical Field

[0001] The invention belongs to the technical field of fiber materials, and in particular relates to a method for preparing recyclable and regenerated environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber. Background Art

[0002] At present, the dyeing performance of ordinary polyester yarn (polyethylene terephthalate) on the market is poor. Due to the specific dyeing groups on the polyester molecular chain and the small polarity, it is difficult to dye, the dyeability is poor, and the dye molecules are not easy to enter the fiber, so the dyeing cost is relatively high; the fabric woven from ordinary polyester yarn filaments has the advantages of good strength, smoothness, crispness, easy washing and quick drying, but it still has the disadvantages of hard feel, poor touch, dull luster, poor breathability, and poor hygroscopicity. Polyester fabric has poor hygroscopicity and no water molecule film for conductivity. Static electricity will accumulate and generate static electricity, stain dust, and affect wearing, feel stuffy, and affect beauty and comfort; in addition, cashmere is a precious fabric in the market, mainly because of its scarcity and excellent quality. The fibers of pure cashmere are relatively thin and short, and the strength is low. Therefore, it needs to be carefully cared for when wearing, especially to avoid long-term friction with hard objects, coarse cloth, chemical fiber and other clothes to avoid unhooking, opening holes, and pilling. Therefore, the limitations are relatively large.

[0003] Therefore, it is necessary to develop a method for preparing a recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber to solve the above problems. Summary of the invention

[0004] The purpose of the present invention is to provide a method for preparing a recyclable and regenerated environmentally friendly cationic cashmere-like special soft yarn double-color differentiated fiber to solve the above problems.

[0005] A technical solution of the present invention is:

[0006] A method for preparing recyclable and regenerated environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber, the method comprising the following steps:

[0007] (1) Recyclable and regenerated colored polyester POY spinning: The recyclable and regenerated chips and masterbatch are melted in a screw extruder, mixed in a mixer, and then sent to a spinning box, ejected from the spinneret holes on the spinneret, and solidified into recyclable and regenerated colored polyester POY filaments through a cooling side-blowing system, and then oiled and bundled;

[0008] (2) core yarn DTY stretching: the recyclable recycled colored polyester POY yarn and the cationic POY hanging yarn are stretched and false-twisted respectively, heated in a first hot box, cooled again, false-twisted, and heated and shaped in a second hot box to obtain stretchable recyclable recycled colored polyester DTY and recyclable recycled cationic polyester DTY;

[0009] (3) ATY air-transformation: The recyclable and regenerated cationic polyester DTY, the recyclable and regenerated colored polyester DTY, and the recyclable and regenerated cationic polyester FDY are hung according to the core-sheath yarn, wherein the core yarn is the recyclable and regenerated cationic polyester DTY and the recyclable and regenerated colored polyester DTY, and the sheath yarn is the recyclable and regenerated cationic polyester FDY. The core yarn and the sheath yarn are respectively passed through a hot roller, humidified by a nozzle in an air-transformation box, and the core yarn and the sheath yarn are combined into one strand in the air-transformation nozzle to form an air-transformation primary yarn. The air-transformation primary yarn is passed through a main roller, an auxiliary roller, and rolled for oiling to obtain a recyclable and regenerated environmentally friendly cationic cashmere-like special soft yarn with two-color differentiated fibers.

[0010] Furthermore, in step (1), the spinning temperature of the spinning manifold is 285° C., and the spinning speed is 3260 m / min.

[0011] Furthermore, in step (1), the side blowing air temperature of the cooling side blowing system is 23° C. and the wind speed is 0.5 m / s.

[0012] Furthermore, in step (1), the oiling height is 900 mm.

[0013] Furthermore, in step (2), the stretching ratio is 1.65, and the D / Y ratio of the false twist is 1.65.

[0014] Furthermore, in step (2), the processing speed is 600 m / min.

[0015] Furthermore, in step (2), the heating temperature of the first hot box is 190°C, the heating temperature of the second hot box for processing recyclable colored polyester DTY is 160°C, and the heating temperature of the second hot box for processing cationic POY is room temperature.

[0016] Furthermore, in step (3), the core wire accounts for 30% and the skin wire accounts for 70%.

[0017] Furthermore, in step (3), the working speed of the main roller is 280-350 m / min, the core yarn overfeed is 10%-50%, and the skin yarn overfeed is 60%-100%.

[0018] Furthermore, in step (3), the recyclable, regenerated, environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber has a breaking strength of 1.2Cn / dt and a curl shrinkage rate of 5%-11%.

[0019] The advantages of the present invention are:

[0020] 1. It can achieve the effect of imitating cashmere, with soft, delicate and smooth feel, full suede surface, and can also reduce material costs;

[0021] 2. The ingredients are made of recyclable and renewable cationic special materials to replace the ordinary polyester currently available on the market, which can achieve room temperature dyeing and solve the difficulties and resource consumption caused by high temperature dyeing;

[0022] 3. Cationic materials not only greatly improve the color absorption performance of the fiber, but also reduce the crystallinity, making it easy for dye molecules to penetrate, making the fiber easy to dye, increasing the color absorption rate, and improving the hygroscopicity;

[0023] 4. Through cationic modification of multifunctional wool-like fabric, the fabric can also be made soft, anti-static, anti-pilling, and can be co-dyed with wool at normal temperature and pressure;

[0024] 5. Cationic also has a two-color effect, which can replace some two-color fabrics of yarn-dyed weaving, thereby reducing resource consumption and being more environmentally friendly;

[0025] 6. All raw materials are recyclable and renewable, which is beneficial to environmental protection and sustainable development. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a process flow diagram of a method for preparing a recyclable and regenerated environmentally friendly cationic cashmere-like special soft yarn double-color differentiated fiber according to the present invention;

[0027] Figure 2 This is a cashmere yarn structure diagram of a method for preparing a recyclable, regenerated, environmentally friendly cationic cashmere-like special soft yarn with two-color differentiated fibers as described in the present invention. DETAILED DESCRIPTION

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more clearly understood, the technical solutions of the present invention are further described below in conjunction with embodiments. However, the present invention is not limited to the embodiments listed, and should also include any other known changes within the scope of the rights claimed by the present invention.

[0029] First, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1

[0031] See also Figure 1 , Figure 1 The figure is a process flow diagram of a method for preparing a recyclable and environmentally friendly cationic cashmere-like special soft yarn double-color differentiated fiber according to the present invention. Figure 1As shown, the preparation process of the recyclable and regenerated environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber is as follows:

[0032] Step S1: Process flow of raw material POY spinning (recyclable colored polyester POY): Preparation of recyclable recycled chips and masterbatches → Recyclable recycled chips and masterbatches are dried in advance and then enter the screw extruder. The temperature and pressure are controlled by the temperature sensor to melt the recyclable recycled chips → The recyclable recycled chips and masterbatches are mixed in the mixer and then sent to the spinning manifold. The entire melt is heated by the biphenyl boiler to produce biphenyl for heat preservation → After the melt reaches the spinning manifold, it passes through the metering pump and the spinning The components are finally filtered, mixed evenly and then distributed to each spinneret (the number of spinneret holes is 36), forming a uniform fine stream that is ejected from the spinneret holes → passing through the cooling side blowing system (the side blowing temperature is 23°C and the side blowing speed is 0.5m / s) to solidify it into filaments (spinning temperature is 285°C and spinning speed is 3260m / min) → oiling and bundling (oiling height is 900mm) to improve the cohesion and winding properties of the filament bundles and eliminate static electricity → winding and forming.

[0033] Step S2: Process flow of core yarn DTY stretching (cationic POY medium-stretch yarn, recyclable colored polyester POY low-stretch yarn): recyclable colored polyester POY, cationic POY (purchased from Shenghong Group) preparation → recyclable colored polyester POY, cationic POY hanging yarn → after being fed from the first roller, stretched by the second roller (the processing speed of the second roller is 600m / min), and at the same time subjected to the false twisting effect transmitted by the false twister (the ratio of the false twister to the processing speed is 1.65) → entering the first hot box (the temperature of the first hot box is 190°C), the yarn undergoes stretching deformation, thermal deformation and other changes under the action of stretching force (stretching multiple is 1.65), false twisting torsional force and heat → entering the cooling plate to fix the thermal deformation of the yarn and reduce its thermoplasticity, so that The yarn has a certain rigidity, which is more conducive to twist transmission → After passing through the false twister, the yarn is twisted and untwisted by the steering of the friction disk to form a false twist → Under the action of the second roller, the yarn is fed into the second hot box to complete the shaping effect, eliminate the internal stress of the deformed yarn, and improve the dimensional stability of the fiber (the hot box for cationic elastic yarn has no temperature, that is, it acts as a silk path; the hot box for regenerated colored low-elastic yarn has a temperature of 160°C) → The role of the third roller is to shape in a relatively relaxed state, eliminate most of the internal stress in the deformation, and make the bulkiness and elasticity moderate → Then, under the action of the oil tanker, add appropriate oil to the yarn to improve the bundling and smoothness of the fiber → Winding and forming, obtain elasticized recyclable recycled colored polyester DTY and recyclable recycled cationic polyester DTY.

[0034] Step S3: ATY air change (cashmere-like soft yarn) process flow: Recyclable regenerated cationic polyester DTY, recyclable regenerated colored polyester DTY, recyclable regenerated cationic polyester FDY (purchased from Shenghong Group) raw material preparation → pick up materials (recyclable regenerated cationic polyester DTY, recyclable regenerated colored polyester DTY, recyclable regenerated cationic polyester FDY) according to the skin-core wire hanging wire, core wire (recyclable regenerated cationic polyester DTY, recyclable regenerated colored polyester DTY) 30%, skin wire (recyclable regenerated cationic polyester FDY) 70%, → core wire passes through hot roller, no No need to draw; the skin yarn passes through the hot roller and does not need to be drawn → humidified by the nozzle in the air deformation box, water wetting can significantly enhance the deformation effect, improve the uniformity and structural stability of the deformed yarn → the air deformation nozzle completes the air deformation (give the core yarn and the skin yarn different overfeed rates to synthesize a strand in the air deformation nozzle, and use a suitable air deformation nozzle to spray air on the synthesized core yarn and skin yarn to form an air deformation primary yarn) → pass through the main roller and auxiliary roller to control the stable tension → the oil tanker rolls and oils the air deformation primary yarn axially, and the air deformation primary yarn is oiled to form an air deformation soft yarn → the winding device winds and forms it, and obtains Figure 2 The recyclable, recycled, environmentally friendly cationic cashmere-like special soft yarn shown is a two-color differentiated fiber.

[0035] In the above process, the present invention uses recyclable cationic DTY polyester and colored polyester as core yarn, recyclable cationic FDY polyester as sheath yarn, utilizes air deformation processes such as stretching, core sheath yarn overfeeding, stabilization and winding overfeeding, and uses Heberly air deformation nozzle to produce a cationic cashmere-like soft yarn, the yarn breaking strength is 1.2Cn / dt, and the yarn curling shrinkage rate is 5%-11%. The main roller works at a speed of 280-350m / min, the core yarn overfeeding is 10%-50%, the sheath yarn overfeeding is 60%-100%, and the stretching is 1.001. The fabric woven with the yarn has a double-color effect, soft luster, moderate elasticity, soft hand feel, good wear resistance, UV resistance, and anti-static effect, meets the fabric requirements of cashmere fabrics on the market, and the product production process is simple, easy to implement, low energy consumption, economical and environmentally friendly.

[0036] The cashmere-like soft yarn produced by this process can be dyed at room temperature (cationic dyeing). Due to the high crystallinity, orientation and glass transition temperature of ordinary polyester fibers, it is difficult for dyes to diffuse into PET molecules under normal pressure without a carrier, and dyeing is difficult. It can only be dyed with disperse dyes under high temperature and high pressure (it needs to be dyed under a certain pressure, high pressure sealing, 125-135°C (3 atmospheres)). Therefore, the dyeing equipment and process are demanding, and there are also disadvantages such as high energy consumption, high cost and environmental pollution. The regenerated and recyclable cationic modified polyester used in the present invention is a regenerated polyester chip with a polar group SO 3A new type of polyester product spun from dimethyl isophthalate of Na has no difference in appearance from ordinary polyester, but due to the use of cationic modification, not only the color absorption performance of the fiber is greatly improved, but also the crystallinity is reduced to make the dye molecules easy to penetrate, and the fiber can be easily dyed at 100°C (1 atmosphere) at normal temperature and pressure, the color absorption rate is improved, and the hygroscopicity is also improved; this fiber can ensure that the cation is easy to dye, and at the same time, the micropores of the fiber can be increased, and the fiber dyeing rate, air permeability, and hygroscopicity can be improved. In addition, the method adopted by the present invention can also reduce the process time, reduce energy consumption, and improve efficiency; at the same time, the degree of damage to the fiber is greatly reduced; the amount of auxiliary agents and the number of industrial water use are reduced, and the cost is saved, which is an environmentally friendly process; it overcomes the difficulty of high-temperature cation / imitation cashmere fabrics requiring high-temperature dyeing.

[0037] Cationic yarn uses cationic dyes, and the cloth surface effect will have a two-color effect. The present invention uses two different polyester raw materials (regenerated cationic and regenerated colored polyester) to form a modified polyester fiber. This modified polyester fiber and ordinary regenerated polyester fiber are colored with different dyes. Cationic polyester can be dyed twice, once for polyester and once for cationic, so that a two-color effect can be achieved, and the characteristic color is bright. Moreover, cationic yarns are resistant to high temperatures. During the yarn coloring process, other yarns will be colored, but cationic yarns will not. In this case, the dyed yarn will present a two-color effect, and the yarn with this effect can be made into various types of clothing.

[0038] The fiber obtained by the present invention has a soft effect imitating cashmere. The present invention feeds several bundles of yarns with different overfeed ratios into the air chamber of the air nozzle in the air texturing yarn machine, and uses the high-pressure vortex in the air chamber to blow the bundles of yarns with different overfeed ratios into yarn loops of different sizes, so that these yarn loops are entangled with each other, and the core yarn (the bundle of yarns with a small overfeed ratio) is tightened, so that the yarn loops are fixed to form fluffy yarn.

[0039] The present invention uses recyclable regenerated cations as raw materials. The regenerated polyester fibers currently used in the market are all made of waste PET bottle flakes as raw materials. The polyester waste is recycled and reused by physical recycling and chemical recycling methods. This raw material is a thermoplastic polymer material. The melt of the regenerated flakes has excellent fiber-forming properties and its fiber fabric (polyester) has excellent wearing properties (wrinkle-resistant, crisp, washable and inexpensive), high breaking strength and elastic modulus, excellent thermal stability, good resilience, superior heat resistance and light resistance, and is also a good solution to the threat to the environment and the waste of resources.

[0040] The comparison of the cationic cashmere imitation of the present invention with ordinary polyester and pure cashmere is shown in Table 1:

[0041]

[0042]

[0043] Table 1

[0044] It can be seen that the recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber described in the present invention can achieve the effect of cashmere-like, with a soft, delicate and smooth feel, a full suede surface, and can also reduce material costs; the use of recyclable and regenerated cationic special materials in the composition replaces the existing ordinary polyester on the market, which can achieve room temperature dyeing and solve the difficulty and resource consumption caused by high temperature dyeing. Cationic materials not only greatly improve the color absorption performance of the fiber, but also reduce the crystallinity, making the dye molecules easy to penetrate, making the fiber easy to dye, improving the color absorption rate, and improving the hygroscopicity; through cationic modified multifunctional wool-like, the fabric can also be made to have a soft feel, anti-static, anti-pilling, and co-dyeing with wool at room temperature and pressure. In addition, the cation also has a two-color effect, which can replace some color-woven two-color fabrics, thereby reducing resource consumption and being more environmentally friendly.

[0045] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A method for preparing recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differentiated fiber, It is characterized in that The method comprises the following steps: (1) Recyclable and regenerated colored polyester POY spinning: The recyclable and regenerated chips and masterbatch are melted in a screw extruder, mixed in a mixer, and then sent to a spinning box, ejected from the spinneret holes on the spinneret, and solidified into recyclable and regenerated colored polyester POY filaments through a cooling side-blowing system, and then oiled and bundled; (2) Texturing of core yarn DTY: the recyclable regenerated colored polyester POY yarn and cationic POY hanging yarn are stretched and false-twisted respectively, heated in a first hot box, cooled again, false-twisted, and heated and shaped in a second hot box to obtain texturized recyclable regenerated colored polyester DTY and recyclable regenerated cationic polyester DTY, wherein the stretching multiple is 1.65, the D / Y ratio of the false twist is 1.65, the heating temperature of the first hot box is 190° C., the heating temperature of the second hot box for processing recyclable regenerated colored polyester DTY is 160° C., and the heating temperature of the second hot box for processing cationic POY is room temperature; (3) ATY air-changing: The recyclable regenerated cationic polyester DTY, recyclable regenerated colored polyester DTY, and recyclable regenerated cationic polyester FDY are hung in the form of core-sheath yarn, wherein the core yarn is the recyclable regenerated cationic polyester DTY and the recyclable regenerated colored polyester DTY, and the sheath yarn is the recyclable regenerated cationic polyester FDY. The core yarn and the sheath yarn are passed through a hot roller respectively, and humidified by a nozzle in an air-changing box. The core yarn and the sheath yarn are combined into one strand in an air-changing nozzle to form an air-changing primary yarn. The air-changing primary yarn is passed through a main roller. Pulling, auxiliary rollers, and rolling oiling are used to obtain recyclable, regenerated, environmentally friendly, cationic cashmere-like special soft yarn two-color differentiated fibers, wherein the core yarn accounts for 30%, the skin yarn accounts for 70%, the working speed of the main roller is 280-350m / min, the core yarn overfeed is 10%-50%, the skin yarn overfeed is 60%-100%, and the recyclable, regenerated, environmentally friendly, cationic cashmere-like special soft yarn two-color differentiated fibers have a breaking strength of 1.2Cn / dt, and a curl shrinkage rate of 5%-11%.

2. A method for preparing a recyclable and environmentally friendly cationic cashmere-like special soft yarn double-color differentiated fiber as claimed in claim 1, Features: In step (1), the spinning temperature of the spinning manifold is 285° C., and the spinning speed is 3260 m / min.

3. The method for preparing the recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differential fiber as claimed in claim 1, Features: In step (1), the side blowing air temperature of the cooling side blowing system is 23° C. and the wind speed is 0.5 m / s.

4. The method for preparing the recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differential fiber as claimed in claim 1, Features: In step (1), the oiling height is 900 mm.

5. The method for preparing the recyclable and environmentally friendly cationic cashmere-like special soft yarn two-color differential fiber as claimed in claim 1, Features: In step (2), the processing speed is 600 m / min.

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