Production process of a highly shrinkable regenerated polyester / polypropylene composite filament

Abstract

The present invention discloses a production process of high-shrinkage regenerated polyester-cationic composite filaments. The regenerated high-shrinkage FDY is sequentially passed through a raw yarn stand, a zero-feed roller, and a guide wheel bypass yarn path. The regenerated bright cationic POY is sequentially passed through a raw yarn stand, a first feed roller, a texturing hot box, a cooling plate, and a Z-twist false twister. The regenerated semi-dull POY is sequentially passed through a raw yarn stand, a first feed roller, a texturing hot box, a cooling plate, and an S-twist false twister. Then, the regenerated high-shrinkage FDY, the regenerated cationic POY, and the regenerated semi-dull POY coming out are input into a second feed roller for ply-twisting. After passing through a network, an auxiliary roller, a shaping hot box, and a third feed roller, they are oiled by an oiling system and wound into shape to produce high-shrinkage regenerated polyester-cationic composite filaments. The fibers prepared by the present invention have physical indexes fully meeting the wearing requirements and are environmentally friendly, and solve the processing quality problems such as thread breakage caused by the change in tension brought about by the traction offset of the yarn bobbin, and improve the production efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of polymer fiber preparation, and particularly to a production process of high-shrinkage regenerated cationic polyester composite filaments. Background Art

[0002] High-shrinkage cationic polyester composite filaments are a kind of yarn with a multi-color effect. It is characterized by being composed of three components A, B, and C (A is cationic filament, B is ordinary polyester filament, and C is regenerated high-shrinkage FDY). Through process conditions such as the wire guiding path, nozzle air injection, and air cut-off, the tightness of the yarn twist is caused, and due to the looseness and tightness of the yarn itself structure, the color is deep and shallow, and the color changes during the dyeing process, thus making a yarn with a deep and shallow layer effect. After subsequent weaving and design, beautiful and practical finished products are obtained, which are thus widely used in evening gowns, high-end fashion, etc. Since the current raw materials for high-shrinkage cationic polyester composite filaments mostly use virgin filaments, with the increasing concern of consumers about environmental protection and sustainability, the virgin material high-shrinkage cationic polyester composite filaments can no longer meet the current usage requirements. To improve market competitiveness, it is necessary to develop a high-shrinkage regenerated cationic polyester composite filament.

[0003] During the texturing production process of high-shrinkage cationic polyester composite filaments, the raw filaments are introduced through the raw filament stand. The filament reels are hung on the hanging wire rods without being limited and fixed. The filament reels are prone to position deviation on the hanging wire rods under the action of the raw filament traction force, resulting in changes in the tension of the raw filaments introduced into the subsequent processes, filament breakage, and affecting the production and processing quality and production efficiency of the texturing machine. Especially when the raw filaments on the filament reels decrease and the quality becomes lighter, the filament reels are prone to fall off the hanging wire rods under the action of the filament traction force, having a more adverse impact on the quality of the composite fibers. In addition, the existing raw filament stand is set with a non-adjustable height, and each time a filament reel is replaced, it is necessary to climb to a height for operation, which poses a safety hazard. Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, provide a production process of high-shrinkage regenerated cationic polyester composite filaments, produce fibers whose physical indicators fully meet the wearing requirements and are environmentally friendly, and solve processing quality problems such as filament breakage caused by tension changes brought about by the traction deviation of the filament reels, and improve production efficiency.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A production process of high-shrinkage regenerated cationic polyester composite filaments, comprising the following steps:

[0007] The regenerated high-shrinkage FDY of 30D / 12F is sequentially passed through the creel, zero-feed roller, and guide wheel bypass silk path. The regenerated bright cationic POY of 75D / 36F is sequentially passed through the creel, first feed roller, texturing hot box, cooling plate, and Z-twist false twister. The regenerated semi-dull POY of 75D / 36F is sequentially passed through the creel, first feed roller, texturing hot box, cooling plate, and S-twist false twister. Then, the regenerated high-shrinkage FDY coming out of the guide wheel bypass silk path, the regenerated cationic POY coming out of the Z-twist false twister, and the regenerated semi-dull POY coming out of the S-twist false twister are input into the second feed roller for ply-twisting. After ply-twisting, the filament bundle is sequentially passed through the network, auxiliary roller, setting hot box, and third feed roller, then oiled by the oiling system, and finally wound and formed to produce the high-shrinkage regenerated cationic-polyester composite filament.

[0008] The creel includes a vertical frame, a plurality of first lead screws rotatably installed in the vertical frame, multiple columns of limiting components fixedly installed in the vertical frame, and a column of yarn bobbin components spaced up and down and screwed on each first lead screw. One column of the limiting components corresponds to one first lead screw and one column of yarn bobbin components one by one. Each column of the limiting components includes a column of horizontally limiting blocks fixedly spaced up and down, and the length of the limiting blocks in the same column gradually shortens from top to bottom. The yarn bobbin component includes a screwing part screwed on the first lead screw, a horizontal sleeve rod part fixedly connected to one side of the screwing part, and a horizontal abutting block fixedly connected to the other side of the screwing part. The sleeve rod part is used for sleeving the silk bobbin. A guide rod is provided on one side of each first lead screw. The plurality of abutting blocks in the same column of yarn bobbin components slide through one guide rod, and the length of the plurality of abutting blocks in the same column of yarn bobbin components gradually lengthens from top to bottom. Initially, the plurality of abutting blocks in the same column of yarn bobbin components are all located below the lowest limiting block of the corresponding column of limiting blocks, and the plurality of abutting blocks in the same column of yarn bobbin components move upward to abut against the corresponding limiting blocks in the corresponding column one by one. The creel further includes a plurality of positioners that can move horizontally. The plurality of positioners are arranged at intervals up and down. The positioner includes a connecting rod part perpendicular to both the sleeve rod part and the first lead screw, and abutting columns distributed at intervals along the length direction of the connecting rod part. The abutting columns cooperate with the sleeve rod part one by one to limit the silk bobbin left and right on the sleeve rod part.

[0009] A second lead screw is screwed at one end of each positioner, and a guide rod is slidably connected to the other end of each positioner. The plurality of second lead screws are rotatably installed in a column on the vertical frame on one side of the multiple columns of yarn bobbin components, and the plurality of guide rods are fixedly installed in a column on the vertical frame on the other side of the multiple columns of yarn bobbin components.

[0010] The sleeve rod part includes a main rod fixedly connected to the screwing part and a convex ring part formed by a protrusion on the outer wall of the main rod. The silk thread cylinder is movably sleeved outside the main rod and abuts inward against the end face of the convex ring part. There is a gap between the inner wall of the silk thread cylinder and the outer wall of the main rod. The abutting column has a truncated cone structure with a smaller inner diameter and a larger outer diameter. The abutting column moves to abut into the gap between the silk thread cylinder and the main rod, and the abutting column is sleeved on the outer end of the main rod.

[0011] The temperature of the texturing hot box for the regenerated bright cationic POY to enter is controlled at 165°C; the temperature of the texturing hot box for the regenerated semi-dull POY to enter is controlled at 165°C.

[0012] The draw ratio of the regenerated high shrinkage FDY combined with the regenerated bright cationic POY and the regenerated semi-dull POY is 1.64.

[0013] The processing speed of the second feed roller is 650 m / min.

[0014] The D / Y ratio is 1.72.

[0015] The beneficial effects of the present invention are as follows: Using regenerated high shrinkage FDY, regenerated bright cationic POY, and regenerated semi-dull POY as raw materials, regenerated cationic polyester DTY with physical indicators fully meeting the clothing requirements is prepared, meeting the production requirements of environmentally friendly fabrics, and some indicators exceeding those of traditional virgin cationic polyester composite filaments. The color gradient of the finished product is more natural and beautiful, and the performance is better; the production process is stable, and the production efficiency can be improved; the twisting effect is better, which can make the changes of the composite yarn more, and then make the varieties of the cationic polyester composite yarn more; by using the improved raw yarn frame device for production, the silk thread cylinder rotates under left and right limits, and the silk thread cylinder can be adjusted to the lower end for yarn changing, solving the processing quality problems such as broken wires caused by the tension change due to the traction offset of the silk thread cylinder, improving the production efficiency, and reducing the safety hazards of climbing high for yarn changing. Description of the Drawings

[0016] Figure 1 is the first perspective three-dimensional view of the raw yarn frame of the present invention;

[0017] Figure 2 is Figure 1 the enlarged view of part A in

[0018] Figure 3 is the second perspective three-dimensional view of the raw yarn frame of the present invention;

[0019] Figure 4 is Figure 3 the enlarged view of part B in

[0020] Figure 5 is the front view of the raw yarn frame of the present invention;

[0021] Figure 6 is Figure 5Cross-sectional view in the C-C direction;

[0022] Figure 7 is Figure 6 Enlarged view of part D in;

[0023] Figure 8 Isometric schematic diagram of the limiting rod of the raw silk frame of the present invention.

[0024] In the figure: vertical frame 1, first lead screw 2, first motor 21, limiting component 3, limiting block 31, connecting rod 32, yarn bobbin component 4, screwed part 41, sleeve rod part 42, main rod 421, convex ring part 422, abutting block 43, guide rod 5, positioning part 6, connecting rod part 61, abutting column 62, groove 63, silk thread bobbin 7, second lead screw 8, second motor 81, guide rod 9. Detailed implementation mode

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation modes:

[0026] Embodiment

[0027] A production process of high-shrinkage regenerated cationic polyester / cotton composite filaments includes the following steps: Pass the 30D / 12F regenerated high-shrinkage FDY through the raw silk frame, zero-feed roller, and guide wheel bypass silk path in sequence, and pass the 75D / 36F regenerated bright cationic POY through the raw silk frame, first feed roller, texturing hot box, cooling plate, and Z-twist false twister in sequence, and pass the 75D / 36F regenerated semi-dull POY through the raw silk frame, first feed roller, texturing hot box, cooling plate, and S-twist false twister in sequence; then input the regenerated high-shrinkage FDY coming out of the guide wheel bypass silk path, the regenerated cationic POY coming out of the Z-twist false twister, and the regenerated semi-dull POY coming out of the S-twist false twister into the second feed roller for ply twisting. After ply twisting, the filament bundle passes through the network, auxiliary roller, shaping hot box, and third feed roller in sequence, and then is oiled by the oiling system, and finally wound and formed to produce high-shrinkage regenerated cationic polyester / cotton composite filaments DTY.

[0028] The temperature of the texturing hot box into which the regenerated bright cationic POY enters is controlled at 165°C; the temperature of the texturing hot box into which the regenerated semi-dull POY enters is controlled at 165°C; the drawing ratio of the ply twisting of the regenerated high-shrinkage FDY, the regenerated bright cationic POY, and the regenerated semi-dull POY is 1.64; the processing speed of the second feed roller is 650 m / min; the D / Y ratio is 1.72.

[0029] When heating the fiber, according to the shrinkage mechanism of the fiber, as the deformation temperature increases, the thermal motion of the macromolecular chains of the fiber becomes more active, the oriented molecules in the amorphous region are relaxed and become disordered, weakening the intermolecular forces, causing a large amount of rapid shrinkage in the fiber axis direction, thereby forming the elasticity of the fiber. As the deformation temperature increases, the heat received by the fiber increases. If it exceeds the melting temperature of the fiber, monofilament bonding will occur, forming point stiffness and affecting the product quality. At the same time, the dyeing uniformity will decrease. The deformation temperature of conventional DTY is generally controlled at 170°C - 180°C. The melting point of the cation is lower than that of the semi-dull. After experimental verification, it is more appropriate to select 165°C as the temperature for the regenerated bright cation POY to enter the deformation heat box.

[0030] Table 1 Comparison of the properties of cationic-polyester composite DTY under different deformation hotlines

[0031]

[0032] Due to the difference in elongation between the cation and the semi-dull, the draw ratio of the ply yarn should be considered comprehensively. As the draw ratio increases, the tensile stress on the POY increases, the crystallinity remains basically unchanged, but the orientation in the amorphous region increases significantly, the false twist stability improves, the false twist effect improves, and defects such as tight points and stiff filaments are reduced, and the dyeing uniformity improves. Considering from the perspective of dyeing uniformity, the draw ratio can be appropriately increased. However, when the draw ratio increases, the monofilament is prone to breakage and form fuzz, and at the same time, the orientation degree increases, increasing the intermolecular forces and weakening its crimping effect. Considering both factors, a suitable draw ratio is selected during production, and the fiber elongation is controlled at (21.5 ± 3)%. After experimental verification, it is more appropriate to select a draw ratio of 1.64.

[0033] Table 2 Comparison of strength, elongation and appearance under different draw ratios (DR)

[0034]

[0035]

[0036] The processing speed of DTY is mainly affected by the inherent quality of POY and the mechanical performance of the texturing machine itself. The higher the orientation degree and crystallinity of POY, the more stable the production process. Therefore, compared with conventional POY, the processing speed of recycled products is lower. After selecting the setting temperature and draw ratio, the maximum processing speed of 83 dtex / 72 f recycled DTY is tested to be 850 m / min. When the speed is higher than this value, the yarn trembles at the outlet of the hot box, the cooling plate and the false twister, and the heating and false twist drawing processes become unstable. Stiff filaments appear in the fiber, the tension fluctuates severely, and the tension difference shown by the on-line tensiometer is obvious. At the same time, as the production speed increases, the heat received by the yarn decreases, and its elastic effect is reduced. In addition, since the number of spindles in the test is limited, in order to ensure a stable processing process for all processing spindles, through experimental comparison, the processing speed of 650 m / min is selected in production.

[0037] Table 3 Comparison at different processing speeds

[0038]

[0039] The D / Y ratio refers to the ratio of the surface speed of the friction disc to the speed of the yarn leaving the false twister. As the D / Y ratio increases, the twisting tension (T1) decreases slightly, the untwisting tension (T2) decreases significantly, and the hairiness decreases. As the D / Y ratio increases, the rotational speed of the friction disc increases, and the slippage of the yarn between the friction discs is severe. If the D / Y ratio is too small, the rotational speed of the friction disc will decrease, the T2 tension will be too large, and hairiness will be generated. After experimental comparison, the D / Y ratio is set at 1.72.

[0040] Table 4 Comparison at different D / Y ratios

[0041]

[0042] As Figure 1-8 shown, the raw yarn stand of the present invention includes a vertical stand 1, a plurality of first lead screws 2 rotatably installed in the vertical stand 1, multiple columns of limiting components 3 fixedly installed in the vertical stand 1, and a column of yarn bobbin components 4 spaced up and down and screwed on each first lead screw 2. The first lead screws 2 are longitudinally rotatably installed, and the first lead screws 2 are driven to rotate by a first motor 21.

[0043] One column of the limiting components 3 corresponds to one first lead screw 2 and one column of yarn bobbin components 4. Each column of the limiting components 3 includes a column of horizontally limiting blocks 31 fixedly spaced up and down, and the lengths of the limiting blocks 31 in the same column gradually become shorter from top to bottom; each column of the limiting components 3 further includes a connecting rod 32 vertically installed on the vertical stand 1, and a column of limiting blocks 31 is fixedly installed on the connecting rod 32, and a column of limiting blocks 31 is distributed in an inverted stepped shape.

[0044] The yarn bobbin assembly 4 includes a screwing portion 41 screwed onto the first lead screw 2, a transverse sleeve rod portion 42 fixedly connected to one side of the screwing portion 41, and a transverse abutting block 43 fixedly connected to the other side of the screwing portion 41. The sleeve rod portion 42 is perpendicular to the first lead screw 2. The sleeve rod portion 42 is used for sleeving a yarn bobbin 7. A vertical guide rod 5 is provided on one side of each first lead screw 2. A plurality of the abutting blocks 43 in the same column of yarn bobbin assemblies 4 slidably pass through one guide rod 5, and the lengths of the plurality of abutting blocks 43 in the same column of yarn bobbin assemblies 4 gradually increase from top to bottom. The guide rod 5 is located between the first lead screw 2 and a column of limit blocks 31. The abutting blocks 43 in the same column are distributed in a stepped manner, and the abutting blocks 43 are arranged in a direction towards the limit blocks 31. Initially, a plurality of the abutting blocks 43 of the yarn bobbin assemblies 4 in the same column are all located below the lowest limit block 31 of the corresponding column of limit blocks 31, and a plurality of the abutting blocks 43 in the same column of yarn bobbin assemblies 4 move upward to abut against the corresponding limit blocks 31 of the corresponding column one by one. Further, in the present invention, if a column of limit blocks 31 includes a first limit block, a second limit block, a third limit block, a fourth limit block, and a fifth limit block distributed from top to bottom, and the lengths of the five limit blocks gradually decrease from top to bottom, then a column of abutting blocks 43 includes a first abutting block, a second abutting block, a third abutting block, a fourth abutting block, and a fifth abutting block distributed from top to bottom, and the lengths of the five abutting blocks gradually increase from top to bottom. Initially, a column of yarn bobbin assemblies 4 is adjusted such that the first to fifth abutting blocks are located below the fifth limit block. A plurality of the abutting blocks 43 in the same column of yarn bobbin assemblies 4 move upward, then the first abutting block moves upward to abut against the first limit block, the second abutting block moves upward to abut against the second limit block, the third abutting block moves upward to abut against the third limit block, the fourth abutting block moves upward to abut against the fourth limit block, and the fifth abutting block moves upward to abut against the fifth limit block. The limit blocks 31 are used to limit the upward movement of the yarn bobbin assembly 4.

[0045] The raw yarn frame further includes a plurality of positioning members 6 that can move horizontally. The plurality of positioning members 6 are arranged at intervals up and down. The positioning member 6 includes a connecting rod portion 61 that is perpendicular to both the sleeve rod portion 42 and the first lead screw 2, and abutting columns 62 that are distributed at intervals along the length direction of the connecting rod portion 61. The abutting columns 62 cooperate with the sleeve rod portion 42 one by one to limit the yarn bobbin 7 left and right on the sleeve rod portion 42. A row of yarn bobbin assemblies 4 at the same height corresponds to one positioning member 6 one by one.

[0046] A second lead screw 8 is screwed at one end of each positioning member 6. Each second lead screw 8 is driven to rotate by a second motor 81. A guide rod 9 is slidably connected to the other end of each positioning member 6. The plurality of second lead screws 8 are rotatably installed in a column on a vertical frame 1 located on one side of the plurality of columns of yarn bobbin assemblies 4, and the plurality of guide rods 9 are fixedly installed in a column on a vertical frame 1 located on the other side of the plurality of columns of yarn bobbin assemblies 4. The guide rod 9, the second lead screw 8, and the sleeve rod portion 42 are arranged in the same direction.

[0047] The sleeve rod part 42 includes a main rod 421 fixedly connected to the screwing part 41, and a convex ring part 422 formed by a convex on the outer wall of the main rod 421. The convex ring part 422 is close to the end of the first lead screw 2. The silk bobbin 7 is movably sleeved outside the main rod 421 and abuts inwardly against the end face of the convex ring part 422. There is a gap between the inner wall of the silk bobbin 7 and the outer wall of the main rod 421. The abutting column 62 has a frustum of a cone structure with a smaller inner diameter and a larger outer diameter. The abutting column 62 moves to abut into the gap between the silk bobbin 7 and the main rod 421, and the abutting column 62 is sleeved on the outer end of the main rod 421. A groove 63 for the main rod 421 to be embedded is provided inside the abutting column 62. The silk bobbin 7 can be made of plastic. The surfaces of the convex ring part 422 and the abutting column 62 are both coated with polytetrafluoroethylene coating. The inner end of the silk bobbin 7 abuts against the convex ring part 422, and the outer end of the silk bobbin 7 abuts against the abutting column 62. The contact areas at both ends of the silk bobbin 7 are small, which can ensure that the silk bobbin 7 can be circumferentially rotated while being limited in the left and right directions.

[0048] When the raw yarn frame of the present invention is in use, the yarn bobbin assembly 4 is at the initial low position. The silk bobbin 7 wound with raw yarn is sleeved on the sleeve rod part 42. The first motor 21 drives the first lead screw 2 to rotate, so that the yarn bobbin assembly 4 moves upward. When the abutting blocks 43 of a row of yarn bobbin assemblies 4 move to abut against a row of limiting blocks 31 one by one, the yarn bobbin assembly 4 cannot continue to move upward; after each yarn bobbin assembly 4 moves into place, each second motor 81 drives the positioning member 6 to move towards the direction close to the yarn bobbin assembly 4 correspondingly. After the abutting column 62 abuts into the gap between the silk bobbin 7 and the main rod 421, the silk bobbin 7 is limited in the left and right directions, and then subsequent texturing production can be carried out. During the production process, since the silk bobbin 7 is always limited in the left and right directions, the silk bobbin 7 will not be driven to shift or even fall due to the reduction of the raw yarn, ensuring the production quality; after the raw yarn is used up, the second motor 81 drives the positioning member 6 to retreat from the silk bobbin 7, and the first motor 21 drives the first lead screw 2 to rotate in the reverse direction, so that the yarn bobbin assembly 4 moves up and down. Then, the silk bobbin 7 can be taken down without climbing to a high place, which is fast and convenient.

[0049] The properties of the high-shrinkage regenerated cationic polyester / polyester composite filament of the present invention were tested, and it was found that the composite filament prepared by the method of the present invention has better breaking strength, crimp shrinkage rate, and crimp stability. In addition, the method of the present invention was compared with the production using a traditional raw yarn frame, and it was found that during mass production, after using the raw yarn frame of the present invention, the yarn breakage rate was reduced by 21.3%, and the production efficiency was increased by 18.5%.

[0050] Table 5 Main physical property indexes of high-shrinkage regenerated cationic polyester / polyester composite filament and conventional cationic polyester / polyester

[0051] Item High Shrinkage Regenerated Positive Polyester / Cotton Composite Conventional Positive Polyester / Cotton Linear Density (dtex) 200.5 166.7 Breaking Strength (cn / dtex) 3.13 2.63 Elongation at Break (%) 25.6 26.4 Crimp Shrinkage Rate (%) 20.2 9.5 Crimp Stability (%) 69.3 66.0 Boiling Water Shrinkage Rate (%) 3.5 3.7 Network Degree (pcs / m) 90 95 Oil Content (%) 2.45 2.40

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A production process of high-shrinkage regenerated cationic polyester composite filaments, characterized in that: It includes the following steps: The 30D / 12F regenerated high-shrinkage FDY is sequentially passed through a raw yarn stand, a zero-feed roller, and a guide wheel bypass yarn path. The 75D / 36F regenerated bright cationic POY is sequentially passed through a raw yarn stand, a first feed roller, a texturing hot box, a cooling plate, and a Z-twist false twister. The 75D / 36F regenerated semi-dull POY is sequentially passed through a raw yarn stand, a first feed roller, a texturing hot box, a cooling plate, and an S-twist false twister. Then, the regenerated high-shrinkage FDY coming out of the guide wheel bypass yarn path, the regenerated cationic POY coming out of the Z-twist false twister, and the regenerated semi-dull POY coming out of the S-twist false twister are input into the second feed roller for ply-twisting. After ply-twisting, the filament bundle is sequentially passed through a network, an auxiliary roller, a setting hot box, and a third feed roller, and then oiled by an oiling system, and finally wound and formed to produce high-shrinkage regenerated cationic polyester composite filaments; The raw yarn stand includes a vertical stand (1), a plurality of first lead screws (2) rotatably installed in the vertical stand (1), multiple columns of limiting components (3) fixedly installed in the vertical stand (1), and a column of yarn bobbin components (4) spaced up and down and screwed on each first lead screw (2). One column of the limiting components (3) corresponds to one first lead screw (2) and one column of yarn bobbin components (4). Each column of the limiting components (3) includes a column of horizontally limiting blocks (31) fixed at intervals up and down, and the lengths of the limiting blocks (31) in the same column gradually become shorter from top to bottom. The yarn bobbin component (4) includes a screwing part (41) screwed on the first lead screw (2), a horizontal sleeve rod part (42) fixedly connected to one side of the screwing part (41), and a horizontal abutting block (43) fixedly connected to the other side of the screwing part (41). The sleeve rod part (42) is used for sleeving a silk thread bobbin (7). A guide rod (5) is provided on one side of each first lead screw (2). Multiple abutting blocks (43) in the same column of yarn bobbin components (4) slidably pass through one guide rod (5), and the lengths of multiple abutting blocks (43) in the same column of yarn bobbin components (4) gradually become longer from top to bottom. Initially, multiple abutting blocks (43) of the same column of yarn bobbin components (4) are all located below the lowest limiting block (31) of the corresponding column of limiting blocks (31), and multiple abutting blocks (43) in the same column of yarn bobbin components (4) move upward to abut against the corresponding limiting blocks (31) of the corresponding column one by one. The raw yarn stand further includes a plurality of positioning members (6) that can move horizontally. The plurality of positioning members (6) are arranged at intervals up and down. The positioning member (6) includes a connecting rod part (61) perpendicular to both the sleeve rod part (42) and the first lead screw (2), and abutting columns (62) distributed at intervals along the length direction of the connecting rod part (61). The abutting columns (62) cooperate with the sleeve rod part (42) one by one to limit the silk thread bobbin (7) left and right on the sleeve rod part (42).

2. The production process of high-shrinkage regenerated cationic polyester composite filaments according to claim 1, characterized in that: One end of each of the positioning members (6) is screwed with a second lead screw (8), and the other end of each of the positioning members (6) is slidably connected with a guide rod (9). A plurality of the second lead screws (8) are rotatably installed in a row on a vertical frame (1) on one side of a plurality of rows of yarn bobbin assemblies (4), and a plurality of the guide rods (9) are fixedly installed in a row on the vertical frame (1) on the other side of the plurality of rows of yarn bobbin assemblies (4).

3. The production process of high-shrinkage regenerated cationic polyester-polyester composite filaments according to claim 1, characterized in that: The sleeve rod portion (42) includes a main rod (421) fixedly connected to the screwed portion (41), and a convex ring portion (422) formed by protruding from the outer wall of the main rod (421). The silk bobbin (7) is movably sleeved outside the main rod (421) and abuts inwardly against the end face of the convex ring portion (422). A gap is provided between the inner wall of the silk bobbin (7) and the outer wall of the main rod (421). The abutting column (62) has a frustum of a cone structure with a smaller inner diameter and a larger outer diameter. The abutting column (62) moves to abut into the gap between the silk bobbin (7) and the main rod (421), and the abutting column (62) is sleeved on the outer end of the main rod (421).

4. The production process of high-shrinkage regenerated cationic polyester-polyester composite filaments according to claim 1, characterized in that: The temperature of the texturing hot box into which the regenerated bright cationic POY enters is controlled at 165 °C; the temperature of the texturing hot box into which the regenerated semi-dull POY enters is controlled at 165 °C.

5. The production process of high-shrinkage regenerated cationic polyester-polyester composite filaments according to claim 1, characterized in that: The draw ratio of the ply of the regenerated high-shrinkage FDY, the regenerated bright cationic POY, and the regenerated semi-dull POY is 1.

64.

6. The production process of high-shrinkage regenerated cationic polyester-polyester composite filaments according to claim 1, characterized in that: The processing speed of the second feed roller is 650 m / min.

7. The production process of high-shrinkage regenerated cationic polyester-polyester composite filaments according to claim 1, characterized in that: The D / Y ratio is 1.72.

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