CN101942723A - Three-component composite yarn and yarn forming method thereof - Google Patents

Abstract

A three-component composite yarn, which is composed of 5%-30% inner core yarn and 70%-95% outer staple fiber by weight ratio and processed by ring spinning machine. The inner core yarn of the composite yarn is made of polyester long It is composed of silk or nylon filament and spandex through air modification. The composite yarn of the present invention has double elastic modulus. After being made into a fabric, it can improve the versatility of the fabric for making clothes. It can not only meet the requirements of the elastic modulus when the deformation is small, but also meet the elastic modulus and the elastic modulus when the deformation is large. It meets the requirements of shape recovery rate, and improves the tightness, shape retention and comfort of clothing.

Description

Three-component composite yarn and yarn forming method thereof

technical field

The invention relates to a fabric fiber, in particular to a three-component composite yarn and a yarn forming method.

Background technique

Composite yarns made of a variety of fibers have been used in the current textile industry, and there are many types. According to the various fiber types that make up the composite yarn, these composite yarns can be roughly divided into: composite yarns composed of short fibers and short fibers, composite yarns composed of chemical fiber filaments and short fibers, and composite yarns composed of chemical fiber filaments and chemical fiber filaments. Three categories of yarn. At present, more composite yarns are generally made of chemical fiber filaments as the core yarn, and a composite yarn with a unique structure formed by outsourcing various short fibers. The commonly used chemical fiber filaments for its core yarn include polyester filaments, nylon filaments, spandex filaments, etc. Outsourced short fibers include cotton, polyester cotton, polyester, nylon, acrylic and wool fibers. There are also many spinning methods for composite yarns: ring spinning, electrospinning, vortex spinning, and self-twisting spinning.

Invention patent CN1250826 relates to a wool-polyester composite yarn, which is composed of colored polyester fibers and formed wool fibers wrapped around each other. According to different process requirements, there are different wrapping forms. One form is that the formed wool fiber and colored polyester filament are wrapped into a single-layer wool-polyester composite yarn in the form of a cylindrical helix. same diameter. Another form is that the colored polyester filament and the formed wool fiber are mutually wrapped in the form of a cylindrical helix to form a single-layer wool-polyester composite yarn, and the diameters of the helixes of the two are different.

Invention patent CN101109129 discloses a moisture-permeable anti-ultraviolet multifunctional antibacterial fabric and its processing technology, which belongs to the technical field of composite fabrics of synthetic fibers and composite yarns. Silk, second warp adopts low-twist composite yarn composed of polyester low-elasticity yarn and spandex high-elasticity yarn, the mass ratio of first warp and second warp is 50:131; Yarn, second weft adopts composite yarn composed of moisture-absorbing sweat-wicking yarn and fine-staple cotton. The two weft yarns are cross-combined in a 1:1 relationship, and the mass ratio of A weft and B weft is 1:1.

At present, my country's cotton spinning industry mostly uses cotton ring spinning to spin composite yarns. There are many studies and reports on filament and staple fiber composite yarns, but the fabrics using this composite yarn do not have double elastic modulus, and the fabrics have low versatility in making clothes.

Contents of the invention

The purpose of the present invention is to provide a dual modulus triple that can not only meet the requirements of small deformation, but also meet the requirements of large deformation, and improve the tightness, shape retention and comfort of clothing. Component composite yarns are used to overcome the problem that the existing composite yarns do not have a double modulus of elasticity, so that the fabrics made have low versatility for clothing making.

Another object of the present invention is to provide a method for forming a three-component composite yarn.

The three-component composite yarn of the present invention comprises 5%-30% inner layer core filament and 70%-95% outer layer short fiber by weight.

The core yarn is composed of polyester filament or nylon filament and spandex, such as; air textured yarn (ATY) made of polyester filament (PET) and spandex filament (PU), nylon filament (PA) and PU ATY, PET and PU made of network yarn (NSY) and PA and PU made of NSY.

The manufacturing method of the core wire is compounding through a network deformation machine or an air deformation machine. The air pressure can be selected from 2-4KG, and it can be compounded by network deformation and air deformation machine. Before compounding, it is generally necessary to pre-stretch the spandex by 2.5-5 times. The drafting ratio is inversely proportional to the ammonia content of the yarn. The drafting ratio should fully consider the drafting characteristics of spandex yarns of different specifications. The best state is to make the spandex yarns in the middle of the strain zone. The linear density and draw ratio of spandex filament have a great influence on the performance of composite yarn. The draft ratio of spandex filament is generally 2.5 times to 5.0 times, and generally not more than 5 times. For example: 4.44tex spandex yarn uses 3 times- 3.5 times the draft; 7.77tex use 3.5 times -4.5 times; 15.54tex use 4 times -5 times; the wool-span elastic composite yarn can be appropriately set smaller, so the 8D spandex is best to use 2.5 times the draft.

Staple fibers include natural staple fibers such as cotton, wool, rabbit down or combinations thereof, and chemical staple fibers such as short polyester and viscose.

Single staple fiber pure spinning adopts the worsted spinning method commonly used in the textile industry, and multiple short fiber blends can adopt the semi-worsted spinning method. The front of worsted spinning can also use cotton spinning or wool spinning. During semi-worsted spinning, a variety of raw materials are pre-opened and pre-mixed, and can be fully mixed by laying horizontally and straight before carding. Considering the public moisture regain (GB9994-2008) of short fibers and the noil in the carding process, the calculation The amount of staple fiber required is produced, and the staple fiber is carded on a carding machine, drawn and drawn after carding, and then passed through a roving frame to be spun into a semi-finished roving.

The core yarn and the short fiber are processed through a ring spinning machine (ZL02104397.3) for filament/short fiber composite processing to form a three-component composite yarn. Feed the short fiber as the outsourcing fiber to the cradle drafting mechanism through the bell mouth of the machine for drafting, and then draw it as the core yarn from the filament unwinding device, the filament tension control device and the filament positioning and guiding device in turn, and then lead out from the rear of the front roller Feed into the nip of the front roller, the core yarn and short fiber strands meet and enter the twisting zone. Before entering the composite twisting zone, the tension of the core yarn is controlled by the tension device, so that the tension value of the core yarn is kept stable within the range of 20-45CN during spinning; at the same time, the core yarn is controlled by the positioning guide device to align it with the staple fiber The center is fed into the twisting triangle area to ensure that the staple fiber and the core yarn are coaxially compounded and twisted at a twist coefficient of 280-340 to form a core-sheath filament/short fiber core-spun composite yarn.

The three-component composite yarn of the present invention exhibits different elastic modulus at different elongation and deformation stages, that is, at small deformation elongation (ε<5%) and large deformation elongation (5%<ε<10%) have different moduli of elasticity.

The beneficial effect that technical solution of the present invention realizes:

The invention discloses a three-component composite yarn, which uses polyester filament (or nylon filament)/spandex air-modified yarn as the core filament, and short fiber (cashmere, rabbit cashmere, etc.) Spindle spinning frame performs composite processing of filament/short fiber to form three-component composite yarn. The clothing fabric made of this composite yarn can produce self-tightening effect with the increase of deformation. When used as a tight clothing fabric, it can greatly improve the tightness of the clothing and its elastic comfort and shape retention effect; as a loose clothing When the fabric is used, it can improve the fluffy effect, drape, thickness and shape retention of the clothing.

Description of drawings

Fig. 1 is the appearance diagram of the three-component composite yarn with staple fiber yarn;

Figure 2 is a cross-sectional view of a three-component composite yarn with staple fiber yarns, where 1 denotes PU and 2 denotes PET. 3 means wool, 4 means rabbit down.

Detailed ways

The technical solution of the present invention is described in detail below.

Example Manufacture of Composite Yarn

Combined with ZL02104397.3, on the FA506 ring spinning machine, the staple fiber strands as the outsourcing fibers are fed to the cradle drafting mechanism through the bell mouth of the machine for drafting, and the network yarns (PET DTY77dtex/36f+PU 44dtex/1f) is drawn out from the filament unwinding device, filament tension control device and filament positioning guide device, and then fed into the nip of the front roller from the rear of the front roller. twisting zone. Before entering the complex twisting zone, the tension of the filament is controlled by a specific tension device, so that the tension value of the filament is kept stable and within a reasonable range during spinning; at the same time, the filament is controlled by a positioning guide device to align it with the center of the staple fiber. Enter the twisting triangle area to ensure the coaxial compound twisting of staple fiber strands and filaments to form a core-sheath type filament/short fiber core-spun composite yarn. See Table 1 for the setting of the yarn forming process parameters of the yarn forming machine.

Table 1 Yarn forming process settings of core-spun composite yarn

The prepared three-component composite yarn has the appearance of short fiber yarn (see Figure 1) and cross-sectional view (see Figure 2), it can be seen that in the core-sheath composite yarn covered with network filaments, the short fiber realizes the Complete sheathing of the mesh wire. The network filaments are bundled in the center of the composite yarn. Since the network filaments are in a certain straightening state, such a composite yarn has the appearance of a staple fiber yarn and the body of a filament yarn, and the yarn has a good feel and elasticity.

It can be seen from Table 2 that ① when the three-component core-spun composite yarn has a small deformation elongation (ε<5%), the tensile force is mainly borne by the core filament, and the outer short fiber is gradually straightened from a crimped state. At this time, the composite yarn The elastic modulus of the thread is also called the crimp elastic modulus E ₁ of the composite yarn, which is mainly determined by the initial modulus of the core filament;

② When the three-component core-spun composite yarn produces a large deformation elongation (5%<ε<10%), the tensile force is mainly borne by the outer short fiber with small elongation and large modulus. At this time, the composite yarn The modulus E ₂ is larger;

③When the deformation elongation of three-component core-spun composite yarn is 5%<ε<10%, the tensile stress gradually increases and is about to overcome the entanglement constraint between the short fibers wrapped in the composite yarn and cause slippage Trend, at this stage, the tensile stress is mainly determined by the entanglement fastness between short fibers and core filaments, at this time, the elastic modulus of the composite yarn is E ₃ ;

④ When the deformation elongation of three-component core-spun composite yarn is 20% ≤ ε ≤ 40%, the outer short fiber slips and breaks, the core yarn is completely straightened, and the macromolecular chain of the core yarn directly bears the tensile stress , which is shown as segment BC on the curve, with the increase of strain, the stress increases linearly and sharply until it breaks completely.

Three-component core-spun composite yarn When the tensile deformation elongation of three-component core-spun composite yarn ε<10%, the elastic modulus _E1 of its deformation elongation ε≤5% is greater than the tensile deformation elongation of 5% The elastic modulus of the stage of ≤ε≤10% is E ₂ . The three-component composite yarn constructed by this patent can show different elastic modulus at different elongation and deformation stages, that is, at small deformation elongation (ε<5%) and large deformation elongation (5%<5%) ε<10%) have different elastic modulus. The clothing fabric made of this composite yarn can produce self-tightening effect as the amount of deformation increases, and when used as a tight clothing fabric, it can greatly improve the tightness of the clothing and its elastic comfort and shape retention effect; as a loose When used in clothing fabrics, it can improve the fluffy effect, drape, thickness, and shape retention of clothing.

Table 2 Performance test of composite yarn

Claims (10)

1. A three-component composite yarn, comprising a weight ratio of 5%-30% inner layer core yarn and 70%-95% outer layer short fiber, characterized in that said inner layer core yarn is made of polyester filament or polyamide fiber Composed of silk and spandex. 2. The three-component composite yarn according to claim 1, characterized in that the inner core yarn is ATY made of PET and PU. 3. The three-component composite yarn according to claim 1, characterized in that the inner core yarn is ATY made of PA and PU. 4. The three-component composite yarn according to claim 1, characterized in that said inner layer core yarn is NSY made of PET and PU. 5. The three-component composite yarn according to claim 1, characterized in that said inner layer core yarn is NSY made of PA and PU. 6. The three-component composite yarn according to claim 1, characterized in that the manufacturing method of the core yarn is composited by a network texturing machine or an air texturing machine, and the air pressure is 2-4KG. 7. The three-component composite yarn according to claim 6, characterized in that the spandex is pre-drawn 2.5-5 times before said compounding. 8. The three-component composite yarn according to claim 1, characterized in that the three-component composite yarn is formed by carrying out long filament/short fiber composite processing with core yarn and short fiber by ring spinning frame . 9. The three-component composite yarn according to claim 8, characterized in that the tension value of the core filament is stably kept within the range of 20-45CN during the composite processing. 10. The three-component composite yarn according to claim 8, characterized in that the core filament and the staple fiber have a twist coefficient of 280-340 in the composite processing.

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