Preparation process and equipment of shellfish compact spun yarn

Abstract

The invention relates to the field of worsted yarns, and particularly discloses a preparation process and equipment of a shell compact spun yarn, the process comprises the following steps: material selection, pretreatment of wool and tencel, multiple sliver mixing of wool and tencel, combing, 4-5 times of gilling, roving to obtain wool tencel roving, and mixing of the wool tencel roving and nylon filaments to obtain the shell compact spun yarn, and the fineness of each component is limited. The nylon filament is limited to be a water-absorbing particle attached nylon filament; the equipment comprises a vacuum gathering device, a drying device and the like. The prepared yarn has good texture, pilling resistance, strength and hygroscopicity.

Description

Technical Field

[0001] The present application relates to the field of worsted yarns, and more specifically, to a preparation process and equipment for tight-spun yarns. Background Art

[0002] The spinning method is crucial to the quality of the yarn, and the choice of spinning method mainly depends on the fiber characteristics and yarn requirements. Compact spinning yarn has high quality, good gloss, soft feel, stable quality, and the fabric is wear-resistant, does not shed, does not pill, has less hairiness, and has a certain wrinkle resistance and is not easy to deform, but the improvement in yarn dryness, coarseness and detail is not large and the equipment cost is high. Cellofel spinning yarn has a simple process and low cost, good yarn quality, synchronous twisting in the same direction, a round cross-section, neat and straight surface fibers, a tight yarn structure, less hairiness, good abrasion resistance, less pilling, and a soft and smooth feel, but it is easy to have hair stripping during the manufacturing process to produce weaving defects. The two spinning methods each have their advantages and disadvantages. Merino superfine wool is delicate and soft, moisture wicking, antibacterial and deodorizing, naturally degradable, and environmentally friendly. In addition, Merino wool is an active fiber that can respond to changes in body temperature, so it will help keep warm when it is cold and will not feel stuffy when it is hot. It is a very suitable raw material for making clothing. Tencel, as the "green fiber of the 21st century", is the most typical environmentally friendly green fiber. It is a regenerated cellulose fiber derived from wood pulp. It is an environmentally friendly and sustainable material with bright color, smooth hand feel, soft and skin-friendly, good drape, and much higher strength than viscose fiber. The blending of the two not only retains the temperature control characteristics and soft and comfortable characteristics of wool, but also further reduces the itching feeling, making the clothing lighter and more comfortable. However, the yarn strength needs to be further improved to meet wider use requirements.

[0003] How to add nylon filaments on this basis to increase the strength of the yarn, meet the development of the yarn's use from close-fitting base layers, home clothes, casual wear and other fields to sportswear, work jackets and other high-strength requirements, make up for the respective shortcomings of the two spinning methods of compact spinning and cellofil spinning, greatly improve the quality of the yarn while having high strength and hygroscopicity, meet customer requirements, and make the resulting yarn applicable in more scenarios is a problem to be solved. Summary of the invention

[0004] In order to solve the problem of high strength and antistatic properties of wool-polyester yarn with a high proportion of polyester added, the present application provides a preparation process and equipment for Becquerel spinning yarn. Becquerel spinning is named by the applicant, which is different from the common sirofil spinning and compact spinning. It is spun by feeding double roving and single filament and vacuum gathering, which is suitable for the special process of the present application.

[0005] In a first aspect, the present application provides a preparation process of a nylon yarn, comprising the following preparation steps: S0: material selection: selecting merino ultrafine wool, tencel and nylon filament as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing 4-5 times, and roving to obtain the wool and tencel roving; S4: The wool Tencel roving and nylon filament yarn prepared in S3 are mixed into a spun yarn to obtain a compact yarn.

[0006] By adopting the above technical solutions, Merino superfine wool is delicate and soft, moisture-absorbing and perspiration-wicking, antibacterial and deodorizing, naturally degradable, and environmentally friendly. In addition, Merino wool is an active fiber that can respond to changes in body temperature, so it helps keep warm when it is cold and does not feel stuffy when it is hot. It is a very suitable raw material for making clothes. Tencel, as the "green fiber of the 21st century", is the most typical environmentally friendly green fiber. It is a regenerated cellulose fiber derived from wood pulp. It is an environmentally friendly and sustainable material with bright color, smooth feel, soft and skin-friendly, good drape, and much higher strength than viscose fiber. The blending of the two not only retains the temperature control characteristics and soft and comfortable characteristics of wool, but also further reduces the itching feeling, making the clothing lighter and more comfortable. By premixing wool and Tencel, the raw materials are mixed more fully and evenly, ensuring that the fibers are evenly dispersed, the yarn is better and more uniform, and it is not easy to slip. Wool, Tencel and nylon filament are used as raw materials. Due to the relatively smooth natural characteristics of Tencel, wool and Tencel are first pre-mixed and evenly mixed before spinning. Two rovings are naturally gathered and twisted into ply yarns at a certain distance in parallel. After stretching, the two bundles of roving can be better twisted with nylon filaments, and then nylon filaments are added to blend together, which can further enhance its strength while ensuring the texture of the yarn.

[0007] In a specific embodiment, the spinning process includes vacuum focusing, the vacuum degree is (-20)-(-30) bar, and the cradle pressure is 2.4-2.6 bar.

[0008] By adopting the above technical solution, vacuum aggregation reduces the influence of the twisting triangle area on strength, and the fibers on the two bundles of roving can be better twisted with the nylon filaments to obtain a more compact structure. The fibers on the surface of the obtained yarn are arranged more neatly, with less hairiness and good strength. Under this vacuum degree, the aggregation effect of free fibers is good. By limiting the cradle pressure, it is suitable for the yarn of this application, ensuring the drafting effect and further improving the yarn strength.

[0009] In a specific possible implementation scheme, the nylon filaments are nylon filaments with water-absorbing particles attached thereto, and the preparation steps include: adding propylene glycol and aluminum chloride to an ethanol aqueous solution, stirring evenly to obtain a cross-linking solution, putting the nylon filaments into the cross-linking solution, soaking them, and then adding acrylic acid water-absorbing particles, stirring evenly, taking out the nylon filaments, and letting them stand to obtain nylon filaments with water-absorbing particles attached thereto.

[0010] By adopting the above technical solution, the water-absorbing particles have a better water-absorbing effect and are more evenly and firmly attached to the surface of the nylon filaments, so that the obtained tight-spun yarn has both high strength and high hygroscopicity, which is more suitable for close-fitting wear and can be applied to more usage scenarios. By attaching a certain mass of water-absorbing particles and cross-linking solution to the nylon filaments, the water-absorbing particles are cross-linked on the surface of the nylon filaments to form protrusions, and the vacuum degree of vacuum aggregation is limited. The free hairiness can be better gathered and adhered to the moist and rough surface of the nylon filaments under this vacuum degree, strengthening the adhesion of the hairy Tencel and the nylon filaments, and further improving the strength of the obtained yarn.

[0011] In a specific embodiment, the fineness of wool is 23-26 mic and the length is 70-75 mmH, the fineness of Tencel is 1.4-1.7 dtex, and the fineness of nylon filament is 22-24 dtex.

[0012] By adopting the above technical scheme, the fineness of wool, tencel and nylon filaments is appropriately matched, the wool and tencel obtained by mixing wool and tencel are uniform in length, have less hairiness, and are not easy to slip between fibers. The mixed wool tencel can be firmly connected with the nylon filaments attached to the water-absorbing particles.

[0013] In a specific embodiment, the mass ratio of wool, tencel and nylon filament is (10-12):1:5.

[0014] By adopting the above technical scheme, the mass ratio is appropriate, the surface fibers of the obtained yarn are neat and straight, the yarn structure is compact, the hairiness is small, the abrasion resistance is good, the pilling is small, the hand feel is soft and smooth, it is not easy to peel off the hair to produce weaving defects, it is light and comfortable, and has high strength.

[0015] In a specific embodiment, the water-absorbing particles include moisture-absorbing particles having an average particle size of 10-20 μm and 30-45 μm.

[0016] By adopting the above technical scheme, the particles have good water absorption effect and are suitable for the yarn of this application. The hygroscopic particles with a particle size of 10-20μm can be more tightly cross-linked on the surface of nylon filaments to improve the connection strength. The hygroscopic particles with a particle size of 30-45μm can participate in cross-linking in the cross-linked network and adhere more firmly to the surface of nylon filaments. In addition, the hygroscopic particles of different particle sizes cooperate with each other to increase the roughness of the surface of nylon filaments, so that they and the wool Tencel are more firmly attached to the surface of nylon filaments.

[0017] In a specific embodiment, the mass ratio of the hygroscopic particles having an average particle size of 10-20 μm and 30-45 μm is 1:(1.7-2.1).

[0018] By adopting the above technical scheme, the added mass of hygroscopic particles of two particle sizes is limited, and the obtained hygroscopic particles are firmly and evenly attached to the surface of nylon filaments, and have high connection strength and roughness. In the subsequent vacuum aggregation process of blending with wool Tencel, the wool Tencel yarns and free fibers can be better adhered and mechanically bonded to the rough nylon filaments by the rough hygroscopic particles, which further improves the bonding between the fibers, and the obtained yarn has higher strength performance.

[0019] In the second aspect, the present application provides a device for spinning yarn, which is applied to the preparation process of the above-mentioned spinning yarn, including a roving device, wherein the roving device is provided with a roving feeding device, a roving feeding device, a rear roller, a middle roller, and a vacuum gathering device in sequence along the conveying direction of the roving. The front roller and the filament enter the vacuum gathering device through the filament feeding device and merge with the roving. The vacuum gathering device includes a guide wheel and a suction pipe.

[0020] By adopting the above technical scheme, the equipment is suitable for the preparation process of the above-mentioned compact spinning yarn, and can better mix the wool Tencel roving and nylon filaments. At the same time, after vacuum aggregation, the free fibers of the wool Tencel can further adhere to the surface of the water-absorbing particles attached to the nylon filament wool Tencel blended yarn. The obtained yarn has higher strength, and has the advantages of both sirofil spinning and compact spinning, retaining the temperature control characteristics and soft and comfortable characteristics of wool, reducing the itching feeling, making the clothing lighter, more comfortable, flat and strong, and the integrated equipment also takes advantage of the water-absorbing particles attached to the surface of the nylon filaments to wet and attach excess cross-linking solution, so that the wool Tencel adheres more tightly to the surface of the nylon filaments during the vacuum aggregation process.

[0021] In a specific possible implementation manner, the spinning device is provided with a drying device below the front roller along the conveying direction of the yarn.

[0022] By adopting the above technical scheme, under the tight embrace of the hairy Tencel and the wet rough water-absorbing particles attached to the nylon filaments, the cross-linked large and small water-absorbing particles are embedded in the hairy Tencel strands and free fibers, and then dried and fixed to form a tight structure, and the connection effect between the two is better.

[0023] In a specific embodiment, the drying temperature of the drying device is 100-150°C.

[0024] By adopting the above technical solution, the drying temperature is suitable, the drying effect is good, and the obtained yarn has good strength performance.

[0025] In summary, this application has the following beneficial effects: 1. Since the wool and Tencel are premixed multiple times in this application, the raw materials are mixed more fully and evenly, ensuring that the fibers are evenly dispersed and the yarn is better.

[0026] 2. Since the present application adopts the self-made compact spinning equipment, the yarn produced has the advantages of both Cellofil spinning and compact spinning, and has the advantages of both gathering and plying yarns. The yarn produced has less hairiness, high strength, and a smooth surface, which greatly improves the quality and strength of the yarn and meets customer requirements.

[0027] 3. Since the present application defines the vacuum degree and cradle pressure of vacuum aggregation, and further defines nylon filaments as water-absorbing particles attached to nylon filaments, the wool Tencel can be more closely bonded to the nylon filaments, and the fibers on the strands and free fibers can be better attached. The yarn strength and density are also improved while the water absorption of the yarn is improved, making it suitable for use in more scenarios. The vacuum degree and cradle pressure are suitable for the yarn of the present application. The fineness, particle size and mass ratio of each component are further defined, and the bonding effect of each component is further improved, so that the strength of the obtained yarn is better.

[0028] 4. The present application installs a drying device under the front roller in the equipment for spinning yarn and limits the drying temperature, which is suitable for the process of directly feeding the water-absorbing particles with a cross-linking solution attached to the surface into the nylon filaments, so that the nylon filaments are tightly bonded to the wool Tencel and fixed, maintaining a good bonding and attachment structure, thereby further improving the strength of the yarn obtained. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application; Figure 2 It is a schematic diagram of the structure of an embodiment of the present application containing a drying device.

[0030] Explanation of the accompanying reference numerals: 11, roving feeding device; 12, roving feeding device; 21, filament feeding device; 3, rear roller; 4, middle roller; 5, guide wheel; 6, suction pipe; 7, front roller; 8, guide drying device. DETAILED DESCRIPTION

[0031] To further help understand the technical solution of the present invention, several specific embodiments are provided to describe the technical solution of the present invention in more detail. All the embodiments described are only partial embodiments of the present invention, not all of them; the embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments. The following embodiments are further explanations of the present invention, and the present invention is not limited thereto.

[0032] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0033] The experimental reagents in the preparation examples, embodiments and comparative examples, unless otherwise specified, are conventional commercial brands or obtained through conventional preparation processes. The operating temperature of all processes is 25° C. and the operating humidity is 65%.

[0034] Preparation Example Preparation Example 1: Preparation of large and small water-absorbing particles: 200g of acrylic acid and 1000ml of deionized water are mixed and stirred to obtain an acrylic acid solution, 300g of sodium hydroxide and 900g of deionized water are mixed to obtain a sodium hydroxide solution, the obtained acrylic acid solution and the sodium hydroxide solution are mixed to obtain a sodium acrylate solution, nitrogen is introduced, 80g of sodium bisulfite, 75g of ammonium persulfate, 10g of N,N-methylenebisacrylamide, and 0.1g of ferrous chloride are added, and the mixture is stirred at 30°C. After 30 minutes, a polymer is obtained by filtering, and 150g of cyclohexane, 15ml of deionized water, 4g of sodium sulfite, and 0.1g of dodecylammonium sulfate are added, the mixture is mixed to obtain a uniform mixture, and the mixture is crushed, dried, and ground to obtain large and small water-absorbing particles with average particle sizes of 35μm and 15μm, respectively.

[0035] Preparation Example 2: Water-absorbent particles attached to nylon filaments: 1000 ml of deionized water, 1000 ml of ethanol, 500 g of aluminum chloride and 500 g of propylene glycol were mixed uniformly to prepare a crosslinking solution. Nylon filaments were put into the crosslinking solution and soaked for 1 hour, and then 400 g of large water-absorbing particles with an average particle size of 35 μm prepared in Preparation Example 1 were added and stirred for 5 minutes. The nylon filaments were taken out and allowed to stand for 5 minutes to obtain water-absorbing particles-attached nylon filaments.

[0036] The fineness of the nylon filament in this preparation example is 22 dtex.

[0037] Preparation Example 3: Water-absorbent particles attached to nylon filaments: 1000 ml of deionized water, 1000 ml of ethanol, 500 g of aluminum chloride and 500 g of propylene glycol were mixed evenly to prepare a crosslinking solution. Nylon filaments were put into the crosslinking solution and soaked for 1 hour, and then 400 g of small water-absorbing particles with an average particle size of 15 μm prepared in Preparation Example 1 were added and stirred for 5 minutes. The nylon filaments were taken out and allowed to stand for 5 minutes to obtain water-absorbing particle-attached nylon filaments.

[0038] The fineness of the nylon filament in this preparation example is 22 dtex.

[0039] Preparation Example 4: Water-absorbent particles attached to nylon filaments: 1000 ml of deionized water, 1000 ml of ethanol, 500 g of aluminum chloride and 500 g of propylene glycol were mixed uniformly to prepare a crosslinking solution. Nylon filaments were put into the crosslinking solution and soaked for 1 hour, and then 200 g of large water-absorbing particles with an average particle size of 35 μm prepared in Preparation Example 1 and 200 g of small water-absorbing particles with an average particle size of 15 μm prepared in Preparation Example 1 were added, stirred for 5 minutes, and the nylon filaments were taken out and allowed to stand for 5 minutes to obtain water-absorbing particle-attached nylon filaments.

[0040] The fineness of the nylon filament in this preparation example is 22 dtex.

[0041] Preparation Example 5: Water-absorbent particles attached to nylon filaments: 1000 ml of deionized water, 1000 ml of ethanol, 500 g of aluminum chloride and 500 g of propylene glycol were mixed evenly to prepare a crosslinking solution. Nylon filaments were put into the crosslinking solution and soaked for 1 hour, and then 267 g of large water-absorbing particles with an average particle size of 35 μm prepared in Preparation Example 1 and 133 g of small water-absorbing particles with an average particle size of 15 μm prepared in Preparation Example 1 were added, stirred for 5 minutes, and the nylon filaments were taken out and allowed to stand for 5 minutes to obtain water-absorbing particle-attached nylon filaments.

[0042] The fineness of the nylon filament in this preparation example is 22 dtex.

[0043] Preparation Example 6: Water-absorbent particles attached to nylon filaments: 1000 ml of deionized water, 1000 ml of ethanol, 500 g of aluminum chloride and 500 g of propylene glycol were mixed evenly to prepare a crosslinking solution. Nylon filaments were put into the crosslinking solution and soaked for 1 hour, and then 267 g of large water-absorbing particles with an average particle size of 35 μm prepared in Preparation Example 1 and 133 g of small water-absorbing particles with an average particle size of 15 μm prepared in Preparation Example 1 were added, stirred for 5 minutes, and the nylon filaments were taken out and allowed to stand for 5 minutes to obtain water-absorbing particle-attached nylon filaments.

[0044] The fineness of the nylon filament in this preparation example is 26 dtex.

[0045] Preparation Example 7: Preparation of wool tencel yarn: S0: Material selection: Select Merino superfine wool with a fineness of 23 mic and a length of 70 mmH, Tencel with a fineness of 1.4 dtex, and the water-absorbing particle-attached nylon filament in Preparation Example 6 in a mass ratio of 10:1:5 as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing 4-5 times, and roving to obtain the wool and tencel roving; Example

[0046] Example 1 S0: Material selection: Merino superfine wool with a fineness of 23 mic and a length of 70 mmH, Tencel with a fineness of 1.4 dtex and nylon filament with a fineness of 22 dtex in a mass ratio of 10:1:5 are selected as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: One wool Tencel roving and one nylon filament obtained in S3 are mixed and spun through Sirofil with a cradle pressure of 2.4 bar to obtain yarn.

[0047] Example 2 S0: Material selection: Merino superfine wool with a fineness of 23 mic and a length of 70 mmH, Tencel with a fineness of 1.4 dtex and nylon filament with a fineness of 22 dtex in a mass ratio of 10:1:5 are selected as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: The two wool tencel rovings and one nylon filament obtained in S3 are mixed and spun through a compact spinning process with a vacuum degree of -20 bar and a cradle pressure of 2.4 bar to obtain yarn.

[0048] Example 3 S0: Material selection: Select Merino superfine wool with a fineness of 23 mic and a length of 70 mmH, Tencel with a fineness of 1.4 dtex, and the water-absorbing particle-attached nylon filament in Preparation Example 2 in a mass ratio of 10:1:5 as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: The two wool tencel rovings and one nylon filament obtained in S3 are mixed and spun through the compact spinning process with a vacuum degree of -20 bar and a cradle pressure of 2.4 bar, and then dried at 120°C to obtain yarn.

[0049] Example 4 S0: Material selection: Select Merino superfine wool with a fineness of 23 mic and a length of 70 mmH, Tencel with a fineness of 1.4 dtex, and the water-absorbing particle-attached nylon filament in Preparation Example 3 in a mass ratio of 10:1:5 as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: The two wool tencel rovings and one nylon filament obtained in S3 are mixed and spun through the compact spinning process with a vacuum degree of -20 bar and a cradle pressure of 2.4 bar, and then dried at 120°C to obtain yarn.

[0050] Example 5 S0: Material selection: Select Merino superfine wool with a fineness of 23 mic and a length of 70 mmH, Tencel with a fineness of 1.4 dtex, and the water-absorbing particle-attached nylon filament in Preparation Example 4 in a mass ratio of 10:1:5 as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: The two wool tencel rovings and one nylon filament obtained in S3 are mixed and spun through the compact spinning process with a vacuum degree of -20 bar and a cradle pressure of 2.4 bar, and then dried at 120°C to obtain yarn.

[0051] Example 6 S0: Material selection: Select merino ultrafine wool with a fineness of 23 mic and a length of 70 mmH, tencel with a fineness of 1.4 dtex, and nylon filaments with water-absorbing particles attached in Preparation Example 5 in a mass ratio of 10:1:5 as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: The two wool tencel rovings and one nylon filament obtained in S3 are mixed and spun through the compact spinning process with a vacuum degree of -20 bar and a cradle pressure of 2.4 bar, and then dried at 120°C to obtain yarn.

[0052] Example 7 S0: Material selection: Select Merino superfine wool with a fineness of 23 mic and a length of 70 mmH, Tencel with a fineness of 1.4 dtex, and the water-absorbing particle-attached nylon filament in Preparation Example 6 in a mass ratio of 10:1:5 as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: The two wool tencel rovings and one nylon filament obtained in S3 are mixed and spun through the compact spinning process with a vacuum degree of -20 bar and a cradle pressure of 2.4 bar, and then dried at 120°C to obtain yarn.

[0053] The following is combined with Figure 1-Figure 2 This application is described in further detail. Example 8 This embodiment discloses a compact spinning device, referring to Figure 1 , including a roving device, which is provided with a roving feeding device, a rear roller, a middle roller, and a vacuum gathering device in sequence along the conveying direction of the roving. The front roller and the filaments enter the vacuum gathering device through the filament feeding device and merge with the roving. The vacuum gathering device includes a guide wheel and a suction pipe.

[0054] The wool tencel roving prepared in Preparation Example 7 is fed through two roving feeding devices, and then passes through the roller, the middle roller, and the vacuum gathering device in sequence. The nylon filaments are fed through the filament feeding device, and are combined with the wool tencel at the vacuum gathering device, and then pass through the guide wire wheel. The suction pipe on the other side provides negative pressure to better gather the roving and the nylon filaments. After combining, the yarn is obtained by passing through the front roller.

[0055] Example 9 The only difference between this embodiment and the eighth embodiment is that there is a drying device under the front roller to dry the collected roving and filaments to fix the shape of the yarn.

[0056] Comparative Example Comparative Example 1 S0: Material selection: Merino superfine wool with a fineness of 23 mic and a length of 70 mmH and Tencel with a fineness of 1.4 dtex in a mass ratio of 10:1 are selected as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing for 4 times, and roving to obtain the wool and tencel roving; S4: The two wool Tencel rovings obtained in S3 are siro-spun at a cradle pressure of 2.4 bar to obtain yarn.

[0057] Performance Test Test 1: Referring to the standard GB / T 3916-2013, the breaking strength of the yarns prepared in each embodiment and comparative example was tested, and the test method was A. The test results are shown in Table 1.

[0058] Test 2: The yarns prepared in each embodiment and preparation example were woven into fabrics, and then the water absorption of the yarns prepared in each embodiment and comparative example was tested with reference to the standard GB / T21655.1-2008. The test results are shown in Table 1.

[0059] Test 3: The yarns prepared in each embodiment and preparation example were woven into fabrics, and then the anti-pilling grade of the yarns prepared in each embodiment and comparative example was tested according to the standard GB / T4802.1-1997, where grade 5 was slightly fuzzy and no pilling, grade 4 was fuzzy and slightly pilling, grade 3 was moderate pilling, grade 2 was slightly serious pilling, and grade 1 was serious pilling. The test results are shown in Table 1.

[0060] Table 1 Breaking strength cN / tex Water absorption (%) Anti-pilling grade Example 1 9.3 181 2 Example 2 16.0 194 4 Example 3 16.7 237 5 Example 4 16.5 229 5 Example 5 18.1 231 5 Example 6 18.6 246 5 Example 7 18.3 240 5 Comparative Example 1 9.3 209 1 It can be seen from Examples 1-2 and Comparative Example 1 and Table 1 that the yarn obtained in the present application has higher strength and anti-pilling grade by premixing wool and Tencel multiple times and by blending two wool Tencels and one nylon filament through homemade equipment for compact spinning.

[0061] From Examples 2-7 and Table 1, it can be seen that the present application further improves the bonding effect of the components by limiting the nylon filaments to water-absorbing particles attached to the nylon filaments, the fineness, particle size and mass ratio of each component, so that the obtained yarn has both water absorption rate and better breaking strength.

[0062] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. A process for preparing a spun yarn. Features: The steps include: S0: Material selection: Merino superfine wool, Tencel and nylon filament are selected as raw materials; S1: blending and combing wool to obtain pretreated wool, and blending and combing tencel to obtain pretreated tencel; S2: blending the pretreated wool obtained in S1 with half the mass of pretreated Tencel for the first time to obtain a primary mixed sliver, blending the mixed sliver with the remaining Tencel for a second time to obtain a secondary mixed sliver, and blending the secondary mixed sliver to obtain a wool-Tencel mixed sliver; S3: The mixed sliver of wool and tencel obtained in S2 is subjected to the first needle combing and then to the mixed sliver combing, and then to the combing, needle combing 4-5 times, and roving to obtain the wool and tencel roving; S4: The wool Tencel roving and nylon filament yarn prepared in S3 are mixed into a spun yarn to obtain a compact yarn.

2. The process for preparing the spun yarn according to claim 1, Features: The spinning process in S4 includes vacuum gathering, the vacuum degree is (-20)-(-30) bar, and the cradle pressure is 2.4-2.6 bar.

3. The preparation process of the spun yarn according to claim 2, Features: The nylon is a nylon filament with water-absorbing particles attached thereto, and the preparation steps include: adding propylene glycol and aluminum chloride to an ethanol aqueous solution, stirring evenly to obtain a cross-linking solution, putting the nylon filament into the cross-linking solution, soaking it, and then adding acrylic acid water-absorbing particles, stirring evenly, taking out the nylon filament, and letting it stand to obtain the nylon filament with water-absorbing particles attached thereto.

4. The process for preparing the spun yarn according to claim 3, Features: The wool has a fineness of 23-26 mic and a length of 70-75 mmH, the tencel has a fineness of 1.4-1.7 dtex, and the nylon filament has a fineness of 22-24 dtex.

5. The process for preparing the spun yarn according to claim 3, Features: The mass ratio of wool, tencel and nylon filament in S1 is (10-12):1:

5.

6. The process for preparing the spun yarn according to claim 3, Features: The water-absorbing particles include those with an average particle size of 10-20 μm and 30-45 μm.

7. The process for preparing the spun yarn according to claim 6, Features: The mass ratio of the hygroscopic particles with average particle sizes of 10-20 μm and 30-45 μm is 1:(1.7-2.1).

8. A yarn spinning device, Features: The preparation process of the spun yarn as described in any one of claims 3 to 7 comprises a spun yarn device, wherein the spun yarn device is provided with a roving feeding device (11), a roving feeding device (12), a rear roller (3), a middle roller (4), and a vacuum gathering device in sequence along the conveying direction of the roving, and the front roller (7) and the filaments enter the vacuum gathering device through the filament feeding device (21) and merge with the roving, and the vacuum gathering device comprises a guide wheel (5) and a suction pipe (6).

9. The process for preparing the spun yarn according to claim 8, Features: The spinning device is provided with a drying device (8) below the front roller along the conveying direction of the yarn.

10. The process for preparing the spun yarn according to claim 9, Features: The drying temperature of the drying device (8) is 100-150°C.

Images