Antibacterial flame-retardant chenille yarn and preparation process thereof

Abstract

The invention discloses an antibacterial flame-retardant chenille yarn and a preparation process thereof, and relates to the technical field of chenille yarns. The fabric comprises camlet, a first plied yarn and a second plied yarn, the camlet is clamped between the first plied yarn and the second plied yarn through twisting, the first plied yarn comprises polyacrylonitrile fibers and aromatic polyamide fibers which are mutually twisted into strands, and the second plied yarn comprises chitosan fibers and fibrilia which are mutually twisted into strands; the polyacrylonitrile fiber and the aromatic polyamide fiber are twisted into the first plied yarn, the chitosan fiber and the jute fiber are twisted into the second plied yarn, then the first plied yarn and the second plied yarn are twisted, and the camlet is clamped between the first plied yarn and the second plied yarn to prepare the chenille yarn, so that the chenille yarn has the existing advantages, and the chenille yarn has the advantages of being simple in structure and convenient to use. And the chenille yarn also has good flame retardant property and antibacterial property, so that the practicability of the chenille yarn is improved.

Description

Technical Field

[0001] This application relates to the technical field of chenille yarn, and specifically relates to an antibacterial and flame-retardant chenille yarn and its preparation process. Background Art

[0002] Chenille yarn, also known as corduroy velvet, is a new type of fancy yarn. It is made by using two ply yarns as core yarns and sandwiching the yarn between them by twisting. Chenille yarn can be made into indoor decorative ornaments such as sofa covers, bedspreads, bed blankets, tablecloths, carpets, wall decorations, curtain veils, etc. Chenille yarn has a soft handfeel, gorgeous fabric, and a velvety feel. It can also be directly used as a knitting yarn, with the characteristics of plumpness, warmth, and good decorative effect. However, it has certain disadvantages. Its antibacterial performance is poor. For example, curtains woven with chenille yarn are not washed frequently, which makes them prone to breeding bacteria and mites, resulting in poor hygienic performance. At the same time, its flame-retardant effect is poor. In addition, when preparing chenille yarn, two core yarns are used to sandwich the yarn between them by twisting through a twisting machine. During the twisting process, the two core yarns pass through two wire holes on the wire ring. When the wire ring rotates, the two core yarns are twisted to sandwich the yarn between them. During the twisting process, when the two wire cores release the wire, the wire will swing greatly, resulting in uneven twisting lines. At the same time, due to the ply yarn being subjected to the twisting stress and transmission stress, and being twisted under the action of the two forces, when the wire core swings greatly, the wire core is prone to collide and rub with the guiding hole of the wire ring, easily resulting in breakage and poor twisting quality. Therefore, this application proposes an antibacterial and flame-retardant chenille yarn and its preparation process. Summary of the Invention

[0003] The purpose of this application is to solve the problems that the existing chenille yarn has poor antibacterial and flame-retardant properties, and at the same time, during the twisting process, the wire will swing greatly, resulting in poor twisting quality and uneven lines. This application provides an antibacterial and flame-retardant chenille yarn and its preparation process.

[0004] To achieve the above purpose, this application specifically adopts the following technical solutions: One of the purposes of this application is to propose an antibacterial and flame-retardant chenille yarn, including yarn, the first ply yarn, and the second ply yarn. The first ply yarn and the second ply yarn sandwich the yarn between them by twisting. The first ply yarn includes polyacrylonitrile fiber and aromatic polyamide fiber and the two are twisted together into a ply. The second ply yarn includes chitosan fiber and hemp fiber and the two are twisted together into a ply.

[0005] Further, the yarn includes basalt fiber and polyester fiber and the two are twisted together into a ply.

[0006] The second object of the present application is to provide a preparation process of antibacterial flame-retardant chenille yarn, which is characterized by comprising the following steps: S1: preparing feather yarn, twisting basalt fiber and polyester fiber into feather yarn through a twisting machine; S2: preparing a first strand, twisting polyacrylonitrile fiber and aromatic polyamide fiber through a twisting machine to form the first strand; S3: preparing a second strand, twisting the chitosan fiber and the hemp fiber through a twisting machine to form the second strand; S4: preparing chenille yarn, twisting the first strand and the second strand through a twisting machine and sandwiching the feather yarn in between, thereby forming the chenille yarn; In the above-mentioned steps S1, S2, S3 and S4, the twisting machine comprises: A base, with transmission guides at both ends of its top, a mounting cylinder rotatably disposed at the top of the base and located between the two transmission guides, two mounting rods symmetrically rotatably penetrate the outer surface of the mounting cylinder, a bracket is disposed on the base, the end of the bracket is placed in the mounting cylinder and is mounted with a bevel gear ring, bevel gears are disposed at the opposite ends of the two mounting rods, and the two bevel gears are meshed with the teeth of the bevel gear ring; A conical cylinder is coaxially connected to one end of the mounting cylinder, and two wire-passing grooves are symmetrically provided on the outer surface of the conical cylinder, and the two wire-passing grooves correspond to the two mounting rods one by one. A mounting frame is provided at one end of the two wire-passing grooves, and a first clamping roller and a second clamping roller are rotatably provided on opposite sides of the inner wall of the mounting frame, and a linkage member is provided on the base, and when the conical cylinder rotates, the linkage member drives the corresponding first clamping roller and the second clamping roller to rotate synchronously in the opposite direction.

[0007] Furthermore, the linkage part includes a first gear ring arranged on the base through a support rod, a rotating rod is rotatably arranged on the mounting frame, a first gear is fixedly provided on the rotating rod and meshes with the teeth of the first gear ring, one end of the rotating rod is transmission-connected to the first clamping roller through a universal coupling, and a second gear is fixedly provided on the first clamping roller and the second clamping roller, and the teeth of the two second gears are meshed.

[0008] Furthermore, four columns are arranged on the installation tube, two of the four columns form a group and the two groups correspond to two installation rods respectively, a movable block and a spring are provided on the movable sleeve of the column, and a guide ring is provided on the movable block.

[0009] Furthermore, a connecting column is rotatably provided on the movable block, a guide ring is fixedly provided on the free end of the connecting column, and a plurality of balls distributed in a ring are rollingly inserted into the inner wall of the guide ring.

[0010] Furthermore, a plurality of guide posts are rotatably arranged on opposite sides of the inner wall of the wire groove.

[0011] Furthermore, several of the guiding columns are distributed in upper and lower layers, and the guiding columns in the upper and lower layers are arranged in a staggered manner.

[0012] Furthermore, a first guiding cylinder is arranged on the bracket through a supporting rod, and a second guiding cylinder is arranged on one of the transmission guiding members through a supporting rod. The first guiding cylinder and the second guiding cylinder are coaxially aligned and there is a gap between them.

[0013] Furthermore, the mounting rod includes an outer rod with a hollow interior. A plurality of through grooves are formed through the outer surface of the outer rod. Two inner columns are slidably inserted into the outer rod. A plurality of elastic pieces are connected between the two inner columns, and the plurality of elastic pieces respectively pass through the plurality of through grooves movably.

[0014] The beneficial effects of the present application are as follows: 1. In the present application, polyacrylonitrile fiber and aromatic polyamide fiber are twisted into a first strand, chitosan fiber and hemp fiber are twisted into a second strand, and then the first strand and the second strand are twisted together with the organdy sandwiched in the middle to make the chenille yarn. When the chenille yarn has the existing advantages, it also has good flame retardant performance and antibacterial performance, thereby improving the practicability of the chenille yarn.

[0015] 2. In the present application, the yarn bobbin is fixed on two mounting rods. When twisting the yarn, the mounting rods rotate synchronously with the mounting cylinder and the conical cylinder to perform synchronous wire feeding. One ends of the first strand and the second strand close to the twisting position are roll-pressed by the first pinch roller and the second pinch roller, and they rotate synchronously in opposite directions. This can not only assist in their transmission and reduce the frictional resistance, but also limit their large-amplitude swinging, making the twisting stable and the twisted yarn line neat, thereby improving the twisting quality. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of the chenille yarn of the present application; Figure 2 is a schematic structural diagram of the organdy of the present application; Figure 3 is a schematic structural diagram of the first strand of the present application; Figure 4 is a schematic structural diagram of the second strand of the present application; Figure 5 is a three-dimensional structure diagram of the twisting machine of the present application; Figure 6 is a front view of the twisting machine of the present application; Figure 7 is a three-dimensional structure sectional view of the twisting machine of the present application; Figure 8 is a three-dimensional structure diagram of the conical cylinder of the present application; Figure 9 is a three-dimensional structure diagram of the bracket of the present application; Figure 10 It is a three-dimensional structure diagram of the mounting bracket of the present application; Figure 11 It is a three-dimensional structure diagram of the column of the present application; Figure 12 It is a three-dimensional structure diagram of the mounting rod of the present application; Figure 13 It is a sectional view of the three-dimensional structure of the mounting rod of the present application; Reference numerals: 1, organdy; 2, first strand; 3, second strand; 4, base; 5, transmission guide; 6, driving member; 7, mounting cylinder; 8, mounting rod; 9, bracket; 10, bevel gear ring; 11, bevel gear; 12, conical cylinder; 13, wire groove; 14, mounting bracket; 15, first pinch roller; 16, second pinch roller; 17, linkage member; 18, column; 19, movable block; 20, spring; 21, guide ring; 22, connecting column; 23, ball; 24, guide post; 25, first guide cylinder; 26, second guide cylinder; 101, basalt fiber; 102, polyester fiber; 201, polyacrylonitrile fiber; 202, aromatic polyamide fiber; 301, chitosan fiber; 302, hemp fiber; 601, second gear ring; 602, drive motor; 603, third gear; 801, outer rod; 802, through groove; 803, inner column; 804, elastic piece; 1701, first gear ring; 1702, rotating rod; 1703, first gear; 1704, universal coupling; 1705, second gear. Detailed implementation manners

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.

[0018] As Figures 1-4As shown in the figure, an antibacterial and flame-retardant chenille yarn proposed in an embodiment of the present application includes a yarn 1, a first strand 2, and a second strand 3. The first strand 2 and the second strand 3 sandwich the yarn 1 between them through twisting. The first strand 2 includes polyacrylonitrile fiber 201 and aromatic polyamide fiber 202, and the two are twisted together into a strand. Polyacrylonitrile fiber 201 refers to a synthetic fiber made from a copolymer of more than 85% acrylonitrile and second and third monomers by wet spinning or dry spinning, which has the characteristics of flame retardancy and good flexibility. Aromatic polyamide fiber 202 is a special fiber spun from a polymer obtained by polycondensation of aromatic diamine and aromatic dicarboxylic acid or aromatic aminobenzoic acid. Due to the benzene ring structure with conjugated double bonds in the main chain of the macromolecule, the glass transition temperature of the polymer increases. Also, due to the relatively large intermolecular force, its melting point is as high as 400 °C. And due to the action of phenylene groups and amide groups between them, the molecule has a certain flexibility. Therefore, the most prominent feature of this fiber is that it can be used at a relatively high temperature, is difficult to burn in the flame, has self-extinguishing properties, good aging resistance, and can withstand most organic solvents. The second strand 3 includes chitosan fiber 301 and hemp fiber 302, and the two are twisted together into a strand. Chitosan fiber 301 is a fiber made by removing acetyl groups from chitin through treatment with concentrated alkali, so it is also called deacetylated chitin fiber or chitosan fiber. Chitin fiber is extracted from the shells of crustaceans such as shrimps, crabs, and insects, and is a renewable and degradable resource. Its antibacterial rate against Escherichia coli, Staphylococcus aureus, Candida albicans, etc. that are harmful to the human body can reach 99%. Its antibacterial mechanism is as follows: First, it may be that in an acidic condition, the amino group in the chitosan molecule is converted into an ammonium salt, which adsorbs negatively charged bacteria and destroys their cell walls, thus hindering their development. Second, it may be that chitosan decomposes into low-molecular substances, and after adsorbing bacteria, it penetrates through the microbial cell wall and enters the cell to form a stable complex with DNA, interfering with the action of DNA polymerase or RNA polymerase, and hindering the synthesis of DNA and RNA, thereby inhibiting the reproduction of bacteria. Hemp fiber 302 is the earliest used natural fiber. It has a unique pore cavity structure inside that can store oxygen, thereby inhibiting the growth of anaerobic bacteria. Its surface has gaps and grooves, giving it good hygroscopicity and destroying the bacterial growth environment. The antibacterial substances such as cannabidiol and tannins contained in hemp fiber 302 can destroy the structure and function of the cell membrane and interfere with the normal metabolism of cells; In this solution, polyacrylonitrile fiber 201 and aromatic polyamide fiber 202 are twisted into the first strand 2, chitosan fiber 301 and hemp fiber 302 are twisted into the second strand 3, and then the first strand 2 and the second strand 3 are twisted together and the yarn 1 is sandwiched in the middle to make a chenille yarn, so that while the chenille yarn has the existing advantages, it also has good flame retardancy and antibacterial properties, thereby improving the practicality of the chenille yarn.

[0019] Such as Figure 2As shown, in some embodiments, the organdy 1 includes basalt fibers 101 and polyester fibers 102 which are twisted together into strands. The basalt fibers 101 are continuous fibers formed by high-speed drawing of molten basalt stone materials at 1450°C to 1500°C through a platinum-rhodium alloy wire-drawing nozzle plate. It is a new type of inorganic environmental protection green high-performance fiber material, which not only has high strength, but also has various excellent properties such as electrical insulation, corrosion resistance, and high temperature resistance. The polyester fibers 102 are fiber-forming polymers prepared from purified terephthalic acid or dimethyl terephthalate and ethylene glycol through esterification or transesterification and polycondensation reactions, and are made into fibers through spinning and post-treatment. The biggest advantage is that it has good wrinkle resistance and shape retention. By twisting the basalt fibers 101 and polyester fibers 102 to form the organdy 1, the organdy 1 has the characteristics of high strength, good wrinkle resistance and shape retention, thereby improving the strength and wrinkle resistance of the chenille yarn, and making the curtains prepared therefrom have good shape retention performance.

[0020] As Figures 5-13 shown, a preparation process of an antibacterial and flame-retardant chenille yarn proposed in an embodiment of the present application is characterized by the following steps: S1: Prepare the organdy 1 by twisting the basalt fibers 101 and polyester fibers 102 with a twister to form the organdy 1; S2: Prepare the first strand 2 by twisting the polyacrylonitrile fibers 201 and aromatic polyamide fibers 202 with a twister to form the first strand 2; S3: Prepare the second strand 3 by twisting the chitosan fibers 301 and hemp fibers 302 with a twister to form the second strand 3; S4: Prepare the chenille yarn by twisting the first strand 2 and the second strand 3 with a twister and sandwiching the organdy 1 in the middle to form the chenille yarn; In the above steps S1, S2, S3 and S4, the twister includes: Base 4, with transmission guides 5 provided at both ends of its top. The transmission guide 5 includes a vertical rod provided on the base 4, and two horizontally arranged transmission rollers are rotatably provided on the vertical rod. The two transmission rollers can rotate synchronously and in opposite directions under the drive of a motor. When twisting, the yarn can be passed through the two transmission rollers, and the two transmission rollers roll against the yarn, which can not only clamp the yarn but also assist in transmitting the yarn. An installation cylinder 7 is rotatably provided on the top of the base 4 of the vertical rod and between the two transmission guides 5. An installation ring is provided on the base 4, and the installation cylinder 7 rotatably penetrates through the installation ring. A driving member 6 for driving the installation cylinder 7 to rotate is provided on the base 4. The driving member 6 includes a second toothed ring 601 fixed on the installation cylinder 7. A driving motor 602 is provided on the base 4, and a third gear 603 meshing with the teeth of the second toothed ring 601 is fixed on the output shaft of the driving motor 602. When the driving motor 602 does work, its output shaft drives the third gear 603 to rotate. Through the meshing of the teeth of the third gear 603 and the second toothed ring 601, the installation cylinder 7 is driven to rotate. Two installation rods 8 symmetrically and rotatably penetrate through the outer surface of the installation cylinder 7. The installation rods 8 are used to fix the bobbin (the bobbin wound with the first strand 2 or the second strand 3). A bracket 9 is provided on the base 4. The end of the bracket 9 is placed inside the installation cylinder 7 and a bevel gear ring 10 is installed. As Figure 9 shown, the bracket 9 includes two legs, one end of the two legs is connected with a ring, the bevel gear ring 10 is fixed on the ring, and bevel gears 11 are provided at the opposite ends of the two installation rods 8, and both bevel gears 11 mesh with the teeth of the bevel gear ring 10. When the installation cylinder 7 rotates, the bevel gears 11 and the bevel gear ring 10 mesh with each other. Since the position of the bevel gear ring 10 is fixed, the bevel gears 11 drive the installation rods 8 to rotate, thereby driving the bobbin fixed thereon to rotate and unwind the wire; A conical cylinder 12 is coaxially connected to one end of the installation cylinder 7. Two wire grooves 13 are symmetrically opened on the outer surface of the conical cylinder 12, and the two wire grooves 13 correspond to the two installation rods 8 respectively. When the installation rod 8 rotates, the bobbin unwinds the wire, and the yarn passes through the wire groove 13 movably. Installation frames 14 are provided at one ends of the two wire grooves 13. The first pinch roller 15 and the second pinch roller 16 are respectively rotatably provided on the opposite sides of the inner wall of the installation frame 14. A linkage member 17 is provided on the base 4. When the conical cylinder 12 rotates, the linkage member 17 drives the corresponding first pinch roller 15 and second pinch roller 16 to rotate synchronously and in opposite directions. Preferably, rubber sleeves are fixed on both the first pinch roller 15 and the second pinch roller 16. The yarn passes through the first pinch roller 15 and the second pinch roller 16, and the first pinch roller 15 and the second pinch roller 16 squeeze the yarn. When the conical cylinder 12 rotates, the linkage member 17 drives the first pinch roller 15 and the second pinch roller 16 to roll and squeeze the yarn. When they rotate synchronously and in opposite directions, they can assist in transmitting the yarn; When twisting yarns (for example, twisting basalt fiber 101 and polyester fiber 102 into yarn 1, twisting polyacrylonitrile fiber 201 and aromatic polyamide fiber 202 into the first strand 2, and twisting chitosan fiber 301 and hemp fiber 302 into the second strand 3, all in the same way), taking the twisting of yarn 1 as an example, two bobbins wound with basalt fiber 101 and polyester fiber 102 are respectively fixed on two mounting rods 8, the ends of the two are respectively placed into two wire grooves 13, and then the ends of the two are respectively passed through the corresponding first pinch roller 15 and second pinch roller 16. Since the wire grooves 13 are opened on the conical surface of the conical cylinder 12, the ends of the two will converge. The converged ends of the two are twisted and passed through the transmission guide 5 on the right side. The two transmission rollers on the transmission guide 5 press the twisted ends of the two. The transmission guide 5 presses and transmits the twisted ends of the two. At the same time, the mounting cylinder 7 drives the conical cylinder 12 to rotate. When the mounting cylinder 7 rotates, the bevel gear 11 and the bevel gear ring 10 are engaged with each other. Since the position of the bevel gear ring 10 is fixed, the bevel gear 11 drives the mounting rod 8 to rotate, thereby driving the bobbins fixed thereon to rotate and unwind the yarn. When the conical cylinder 12 rotates, the linkage 17 drives the first pinch roller 15 and the second pinch roller 16 to roll and squeeze the yarn. When the two rotate in opposite directions synchronously, they can assist in transmitting the yarn. The conical cylinder 12 rotates, driving the two yarns to rotate, so that the two yarns are twisted. During the twisting process, the yarn contacts the first pinch roller 15 or the second pinch roller 16. Since the first pinch roller 15 and the second pinch roller 16 rotate in opposite directions synchronously, not only can they assist in conveying it, but also the rotation of the first pinch roller 15 and the second pinch roller 16 can reduce the friction force between the yarn and its contact, so that during the twisting process, the yarn is not easily broken due to the twisting spiral stress, ensuring the twisting quality. At the same time, the first pinch roller 15 and the second pinch roller 16 are located at the conical tip of the conical cylinder 12, close to the twisting point of the two yarns. The first pinch roller 15 and the second pinch roller 16 clamp and convey the yarn, not only avoiding large swings of the yarn, but also assisting in transmitting the yarn, making its transmission stable, the twisting line neat, and improving its twisting quality; When performing the final twisting step (when twisting yarn 1, the first strand 2, and the second strand 3), it is slightly different from the above operation method. The two ends of yarn 1 need to be respectively passed through the transmission guides 5 on both sides. The two transmission guides 5 limit the transmission of yarn 1, so that a section of yarn 1 located between the two transmission guides 5 remains horizontal, and yarn 1 remains in a state coaxial with the mounting cylinder 7 and the conical cylinder 12. The bobbins of the first strand 2 and the second strand 3 are respectively fixed on two mounting rods 8, and the subsequent operations are the same as the above operations; In this solution, the yarn bobbins are fixed on two mounting rods 8. When twisting, the mounting rods 8 rotate synchronously with the mounting tube 7 and the conical tube 12 to release the yarn synchronously. The first strand 2 and the second strand 3 are rolled and pressed by the first clamping roller 15 and the second clamping roller 16 at one end close to the twisting position, which can not only assist their transmission and reduce friction resistance, but also limit their large swing, so that the twisting is stable and the twisted lines are neat, thereby improving the twisting quality.

[0021] like Figure 8 and Figure 10 As shown, in some embodiments, the linkage member 17 includes a first gear ring 1701 arranged on the base 4 through a support rod, a rotating rod 1702 is rotatably arranged on the mounting frame 14, a first gear 1703 meshing with the teeth of the first gear ring 1701 is fixedly arranged on the rotating rod 1702, one end of the rotating rod 1702 is transmission-connected to the first clamping roller 15 through a universal coupling 1704, and a second gear 1705 is fixedly arranged on the first clamping roller 15 and the second clamping roller 16, and the two second gears 1705 mesh with each other. When the conical cylinder When 12 rotates, the first gear 1703 on the rotating rod 1702 and the first gear ring 1701 are meshed. Since the first gear ring 1701 is fixed, the first gear 1703 drives the rotating rod 1702 to rotate, and under the linkage of the universal coupling 1704, the first clamping roller 15 is driven to rotate. Through the meshing of the teeth of the two second gears 1705, the first clamping roller 15 and the second clamping roller 16 are driven to rotate synchronously in the opposite direction, so as to realize auxiliary yarn transmission and reduce the friction when the yarn contacts it.

[0022] like Figure 6 and Figure 11 As shown, in some embodiments, four columns 18 are provided on the mounting tube 7, and the four columns 18 are grouped in pairs, and the two groups correspond to the two mounting rods 8 respectively. A movable block 19 and a spring 20 are movably sleeved on the column 18, and a guide ring 21 is provided on the movable block 19. Preferably, a limit plate is provided at the free end of the column 18, and the column 18 adopts a spline rod. The movable block 19 is splined with the column 18, so that the movable block 19 can only slide vertically along the column 18 and cannot rotate in a circle. Figure 11 As shown, the springs 20 located on the two uprights 18 in the same group are staggered up and down. When paying out the yarn, it needs to pass through the two guide rings 21 located in the same group. Since the yarn is wound up and down on the bobbin (the bobbin in an upright state) in sequence, the silk thread is also paid out in sequence up and down when paying out the yarn. The yarn is formed into an S shape by passing through the two guide rings 21, and the tension of the yarn is adaptively adjusted by the two springs 20, so that during the paying out process, the section of the yarn located between the bobbin and the mounting frame 14 will not be loose and disorderly, thereby further reducing the swing amplitude of the yarn to ensure the twisting quality.

[0023] As Figure 11 shown, in some embodiments, a connecting post 22 is rotatably arranged on the movable block 19, a guide ring 21 is fixedly arranged at the free end of the connecting post 22, and a plurality of annularly distributed balls 23 are rollingly inserted into the inner wall of the guide ring 21. By rotating the arranged connecting post 22, when the yarn is adjusted for the adaptive tension force, the guide ring 21 can be rotationally adjusted to make the formed S shape smoother and more fluent. By rollingly inserting the balls 23 into the inner wall of the guide ring 21, the yarn contacts the balls 23, and by utilizing the free rolling of the balls 23, the contact friction between the yarn and the guide ring 22 is further reduced, the wear of the yarn is reduced, and the quality of the yarn twisting is improved.

[0024] As Figure 7 and Figure 8 shown, in some embodiments, a plurality of guide posts 24 are rotatably arranged on the opposite sides of the inner wall of the wire groove 13. Since the yarn is adjusted for the tension force through two guide rings 21 and two springs 20, by arranging the guide posts 24 in the wire groove 13, the yarn can be guided and limited, and its swinging amplitude is further reduced, ensuring that the two yarns can stably converge for twisting.

[0025] As Figure 7 and Figure 8 shown, in some embodiments, a plurality of guide posts 24 are distributed in upper and lower two layers, and the upper and lower two layers of guide posts 24 are arranged in a staggered manner. When the yarn passes through the wire groove 13, the yarn overlaps with the bottom of the guide posts 24 in the upper layer and overlaps with the top of the guide posts 24 in the lower layer, thereby effectively guiding and limiting the yarn, making a section of the yarn in the wire groove 13 parallel to the conical surface of the conical cylinder 12, making the convergence and twisting point of the two yarns more stable, and further improving the twisting effect.

[0026] As Figure 6 and Figure 7 shown, in some embodiments, a first guide cylinder 25 is arranged on the bracket 9 through a support rod, and a second guide cylinder 26 is arranged on one of the transmission guide members 5 through a support rod. The first guide cylinder 25 and the second guide cylinder 26 are coaxially aligned and there is a gap between them. Preferably, in the last twisting step (the twisting of the gauze 1, the first strand 2, and the second strand 3), the gauze 1 first movably passes through the first guide cylinder 25. After the gauze 1, the first strand 2, and the second strand 3 are twisted, the three together pass through the second guide cylinder 26, and the twisting point of the three is just located at the gap between the first guide cylinder 25 and the second guide cylinder 26. Since the first strand 2 and the second strand 3 are twisted on the gauze 1 under the action of the helical stress, under the action of the helical stress, the gauze 1 will generate a certain degree of shaking. Through the guiding and limiting of the first guide cylinder 25 and the second guide cylinder 26, the shaking amplitude is further reduced, and the twisting quality is further improved.

[0027] AsFigure 13 As shown, in some embodiments, the mounting rod 8 includes an outer rod 801 with a hollow interior. A plurality of through slots 802 are formed through the outer surface of the outer rod 801. Two inner columns 803 are slidably inserted into the outer rod 801. A plurality of elastic pieces 804 are connected between the two inner columns 803. Preferably, the elastic pieces 804 can be made of elastic metal sheets (stainless steel). The plurality of elastic pieces 804 respectively pass through the plurality of through slots 802 movably. In the initial state, the elastic pieces 804 are in an arc shape, and the distance between the arc segments of the two opposite elastic pieces 804 is greater than the inner diameter of the bobbin. The inner diameter of the bobbin is adapted to the outer diameter of the outer rod 801. When fixing the bobbin, the bobbin is sleeved on the outer rod 801, and then the bobbin is slid downwards. The bobbin will squeeze the elastic pieces 804 to cause them to deform. When the box body is sleeved, the elastic pieces 804 will squeeze and abut against the inner wall of the bobbin, thereby fixing the bobbin. The elastic deformation of the elastic pieces 804 is used to fix the bobbin, making it more convenient and rapid to place or remove the bobbin.

[0028] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.​

Claims

1. An antibacterial flame-retardant chenille yarn, comprising a feather yarn (1), a first strand (2) and a second strand (3), characterized in that: The first strand (2) and the second strand (3) sandwich the feather yarn (1) between them by twisting, the first strand (2) comprising polyacrylonitrile fiber (201) and aromatic polyamide fiber (202) being twisted together, and the second strand (3) comprising chitosan fiber (301) and hemp fiber (302) being twisted together.

2. The antibacterial flame retardant chenille yarn according to claim 1, characterized in that: The feather yarn (1) comprises basalt fibers (101) and polyester fibers (102), and the two fibers are twisted together into strands.

3. A process for preparing antibacterial flame-retardant chenille yarn, characterized in that: The method comprises the following steps: S1: preparing feather yarn (1), twisting basalt fiber (101) and polyester fiber (102) through a twisting machine to form feather yarn (1); S2: preparing a first strand (2), twisting polyacrylonitrile fiber (201) and aromatic polyamide fiber (202) through a twisting machine to form the first strand (2); S3: preparing a second strand (3), twisting chitosan fiber (301) and hemp fiber (302) through a twisting machine to form the second strand (3); S4: preparing chenille yarn, twisting the first strand (2) and the second strand (3) through a twisting machine and sandwiching the feather yarn (1) in between, thereby forming chenille yarn; In the above-mentioned steps S1, S2, S3 and S4, the twisting machine comprises: a base (4), both ends of which are provided with transmission guides (5), a mounting cylinder (7) is rotatably provided at the top of the base (4) and located between the two transmission guides (5), the outer surface of the mounting cylinder (7) is symmetrically rotatably penetrated by two mounting rods (8), a bracket (9) is provided on the base (4), the end of the bracket (9) is placed in the mounting cylinder (7) and is provided with a bevel gear ring (10), and the opposite ends of the two mounting rods (8) are provided with bevel gears (11), and the two bevel gears (11) are both engaged with the gears of the bevel gear ring (10). The conical cylinder (12) is coaxially connected to one end of the mounting cylinder (7); the outer surface of the conical cylinder (12) is symmetrically provided with two wire grooves (13), and the two wire grooves (13) correspond to the two mounting rods (8) one by one; a mounting frame (14) is provided at one end of the two wire grooves (13); the first clamping roller (15) and the second clamping roller (16) are rotatably provided on the opposite sides of the inner wall of the mounting frame (14); a linkage member (17) is provided on the base (4); when the conical cylinder (12) rotates, the linkage member (17) drives the corresponding first clamping roller (15) and the second clamping roller (16) to rotate synchronously in the opposite direction.

4. The process for preparing the antibacterial flame-retardant chenille yarn according to claim 3, characterized in that: The linkage member (17) comprises a first gear ring (1701) arranged on a base (4) via a support rod, a rotating rod (1702) rotatably arranged on the mounting frame (14), a first gear (1703) fixedly arranged on the rotating rod (1702) and meshing with the teeth of the first gear ring (1701), one end of the rotating rod (1702) being transmission-connected to the first clamping roller (15) via a universal coupling (1704), and a second gear (1705) fixedly arranged on the first clamping roller (15) and the second clamping roller (16), and the teeth of the two second gears (1705) meshing with each other.

5. The process for preparing the antibacterial flame-retardant chenille yarn according to claim 3, characterized in that: The mounting tube (7) is provided with four columns (18), the four columns (18) are grouped in pairs and the two groups correspond to the two mounting rods (8) respectively, the columns (18) are movably sleeved with a movable block (19) and a spring (20), and the movable block (19) is provided with a guide ring (21).

6. The process for preparing the antibacterial flame-retardant chenille yarn according to claim 5, characterized in that: A connecting column (22) is rotatably provided on the movable block (19), a guide ring (21) is fixedly provided on the free end of the connecting column (22), and a plurality of balls (23) distributed in an annular shape are rollingly inserted into the inner wall of the guide ring (21).

7. The process for preparing the antibacterial flame-retardant chenille yarn according to claim 3, characterized in that: A plurality of guide posts (24) are rotatably arranged on opposite sides of the inner wall of the wire passing groove (13).

8. The process for preparing the antibacterial flame-retardant chenille yarn according to claim 7, characterized in that: The plurality of guide columns (24) are distributed in two layers, and the two layers of guide columns (24) are staggered.

9. The process for preparing the antibacterial flame-retardant chenille yarn according to claim 3, characterized in that: A first guide cylinder (25) is provided on the bracket (9) via a support rod, and a second guide cylinder (26) is provided on one of the transmission guide members (5) via a support rod. The first guide cylinder (25) and the second guide cylinder (26) are coaxially aligned with a gap therebetween.

10. The process for preparing the antibacterial flame-retardant chenille yarn according to claim 3, characterized in that: The mounting rod (8) comprises an outer rod (801) with a hollow interior, a plurality of through slots (802) being formed through the outer surface of the outer rod (801), two inner columns (803) being slidably inserted into the outer rod (801), a plurality of spring plates (804) being connected between the two inner columns (803), and the plurality of spring plates (804) being movably formed to penetrate the plurality of through slots (802).

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