A method for manufacturing viscose / mulberry silk waste blended yarn

Abstract

The application relates to a viscose / silk floss blended yarn preparation method, which comprises adjacent carding processes, pre-drawing processes, sliver combining processes, combing processes, and the carding adopts progressive multi-stage carding clothing, the progressive multi-stage carding clothing comprises a base and a tooth part arranged above the base; the tooth part comprises main carding teeth, each main carding tooth is provided with an auxiliary carding tooth on the tooth front face, and each main carding tooth is provided with a finishing tooth on the tooth back face; the working angle of each finishing tooth is alpha 1, the working angle of each auxiliary carding tooth is alpha 2, the working angle of each main carding tooth is alpha 3, alpha 1, alpha 2 and alpha 3 increase to form progressive multi-stage carding; the pre-drawing process comprises a first pre-drawing process and a second pre-drawing process, the first pre-drawing process adopts a sliver inversion turning mode to feed into the pre-drawing machine, so that the sliver changes from a state that the front hook fibers are in the majority to a state that the rear hook fibers are in the majority. The spinning method is simple and easy to operate, the spun yarn has high fineness and quality, and the floss recycling ratio is high.

Description

Technical Field

[0001] This invention belongs to the field of spinning technology and relates to a method for preparing viscose / silk recycled blended yarn. Background Technology

[0002] Viscose / silk blended yarns possess excellent moisture absorption and breathability, a smooth hand feel, a soft texture, and a layered luster, making them suitable for developing high-end apparel fabrics, home textiles, and bedding products. During the spinning process, various steps generate processing waste such as carding dust, sliver rewinding, roving end opening waste, and fine yarn bellows waste. Most of this waste is sold at low prices, resulting in a waste of raw materials. Silk is expensive, generally costing 200,000 to 350,000 yuan per ton. Taking the production of a 40-count compact viscose / silk (90:10 quality ratio) yarn as an example, the silk value in the blended waste generated during production alone reaches approximately 30,000 yuan per ton. If sold as waste, it can only be sold at the viscose waste price of about 8,000 yuan per ton, significantly increasing the raw material cost of this type of blended yarn. Therefore, how to reuse viscose / silk waste in high-quality spinning is of great significance for reducing production costs and improving raw material utilization.

[0003] However, due to the problems of high content of knots, short fibers, and many fiber hooks in viscose / silk scraps, conventional spinning processes have poor spinnability and can only produce low-count yarns. If higher-count yarns are to be spun, in order to ensure the quality of the yarn, only a small amount of the same-count scrap can be mixed in (usually the proportion of the same-count scrap to cotton is about 5%). In other words, it is difficult to simultaneously achieve the yarn quality of medium and high-count yarns and a high proportion of scrap reuse.

[0004] Patent CN103726151B discloses a method for spinning yarn using waste cotton. This patent describes a process where broken cotton seeds from the cotton cleaning process are treated in a waste cotton processing machine. The resulting cotton is then blended with a composition of 25% broken cotton seeds, 45%-55% dust removal waste, 10% shaving waste, 10%-20% combed waste, and 5% recycled cotton of the same count. The blended cotton is then spun into 7-16 count yarn through cleaning, carding, first drawing, second drawing, and air-jet spinning processes. The spun yarn is used as napping yarn and is classified as a low-count yarn.

[0005] Patent CN103774310B discloses a production method of cotton waste / viscose fiber sirospun blended yarn, which comprises the following steps: (1) opening and cleaning cotton; (2) carding; (3) doubling; (4) roving; (5) spinning. The main technical scheme comprises the following steps: the beater of the opener is changed from a blade to a carding needle, the opening degree is improved; the gauge between the dust bar and the dust bar and the gauge between the cotton plate and the taker-in are enlarged, the fiber damage is reduced; the gauge between the cylinder and the flat is reduced, the carding is strengthened; three blending is adopted, the two fibers are fully mixed, and cotton waste / viscose fiber 70 / 30, 36.4 tex siro yarn is obtained, and the yarn indexes are improved to different degrees. The patent improves the cotton waste ratio through process improvement, but the spun yarn is still low count yarn.

[0006] Patent CN102505230A discloses a production method of all-cotton waste yarn, which uses the waste after each process of cotton fiber spinning as raw material, and comprises the following steps in sequence: raw fiber pretreatment process, cleaning and carding process, doubling process, roving process, spinning process, and bobbin winding process. The patent uses doubling, roving and spinning waste to prepare 20, 30 and 40 cotton yarns, but the yarn quality is inferior to that of normal all-cotton yarn.

[0007] Therefore, it is of great significance to study a preparation method of viscose / silk waste blended yarn to solve the problem that the existing technology cannot simultaneously consider the yarn quality of medium and high count yarn and the high proportion of waste reuse. SUMMARY

[0008] The purpose of the present application is to solve the problems in the prior art and provide a preparation method of viscose / silk waste blended yarn.

[0009] To achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0010] A preparation method of viscose / silk waste blended yarn, comprising adjacent carding process, pre-doubling process, strip doubling process and combing process, the carding adopts progressive multi-stage carding clothing, and the progressive multi-stage carding clothing comprises a base and a tooth part arranged above the base;

[0011] The tooth part comprises main carding teeth, each main carding tooth is provided with an auxiliary carding tooth on the tooth front face, and each main carding tooth is provided with a finishing tooth on the tooth back face;

[0012] The tooth front face of each auxiliary carding tooth is transitionally connected with the tooth back face of the finishing tooth on one main carding tooth on the front side of the main carding tooth where the auxiliary carding tooth is located, and the tooth back face of each auxiliary carding tooth is transitionally connected with the tooth front face of the main carding tooth where the auxiliary carding tooth is located;

[0013] The tooth front of each finishing tooth is transitionally connected with the tooth back of the main carding tooth where the finishing tooth is located, and the tooth back of each finishing tooth is transitionally connected with the tooth front of the auxiliary carding tooth on one main carding tooth behind the main carding tooth where the finishing tooth is located;

[0014] The working angle (the included angle between the tangent of the tooth front at the tooth tip and the vertical line of the lower surface of the base) of each finishing tooth is α1, the working angle of each auxiliary carding tooth is α2, and the working angle of each main carding tooth is α3, and α1, α2 and α3 increase to form a progressive grading carding;

[0015] The pre-drawing process includes a first pre-drawing process and a second pre-drawing process, wherein the first pre-drawing process uses a sliver inversion turning method to feed the pre-drawing machine, so that the sliver changes from a majority of front hook fibers to a majority of rear hook fibers.

[0016] As a preferred technical solution:

[0017] The preparation method of the viscose / silk waste blend yarn as described above, wherein α1 is 5°, α2 is 20°, and α3 is 30°.

[0018] The preparation method of the viscose / silk waste blend yarn as described above, wherein the distance between the tooth tip C of each main carding tooth and the lower surface of the base and the distance between the tooth tip A of each finishing tooth and the lower surface of the base are both h1, and the distance between the tooth tip B of each auxiliary carding tooth and the lower surface of the base is h2, h1 is 1.8 mm, and h2 is 1.675 mm.

[0019] The preparation method of the viscose / silk waste blend yarn as described above, wherein the tooth tip B of each auxiliary carding tooth is located in front of the tooth tip C of the main carding tooth where the auxiliary carding tooth is located, and the distance L1 between the two is 0.12 mm.

[0020] The preparation method of the viscose / silk waste blend yarn as described above, wherein the width b1 of the base is 0.5 mm, the tooth width b2 of the finishing tooth, the tooth width of the auxiliary carding tooth, and the tooth width of the main carding tooth are all 0.15 mm, the tooth top width b4 of the finishing tooth is 0.06 mm, the tooth top width b3 of the auxiliary carding tooth is 0.08 mm, and the tooth top width of the main carding tooth is 0.06 mm.

[0021] The preparation method of the viscose / silk waste blend yarn as described above, wherein the distance p between the tooth tips A of two adjacent finishing teeth in the direction parallel to the lower surface of the base is 1.8 mm.

[0022] The preparation method of the viscose / silk waste blend yarn as described above, and the overall process flow is: viscose / silk waste blend yarn selection -> raw material selection and premixing -> opening and scutching -> carding -> first pre-drawing -> second pre-drawing -> sliver combining and rolling -> combing -> sliver combining -> roving -> spinning.

[0023] The application discloses a preparation method of viscose / silk noil blended yarn.

[0024] The application discloses a preparation method of viscose / silk noil blended yarn.

[0025] The application discloses a preparation method of viscose / silk noil blended yarn.

[0026] The application discloses a preparation method of viscose / silk noil blended yarn.

[0027] The application discloses a preparation method of viscose / silk noil blended yarn.

[0028] The application discloses a preparation method of viscose / silk noil blended yarn.

[0029] The application discloses a preparation method of viscose / silk noil blended yarn.

[0030] The method for preparing the viscose / silk noil blended yarn as described above, the final prepared viscose / silk noil blended yarn has a count of not less than 32S, the proportion of the viscose / silk noil blended yarn is not less than 40wt%, preferably, the proportion of the viscose / silk noil blended yarn is 40-70wt%, the yarn linear density deviation rate is-0.2-0.9%, the single yarn breaking strength is 15.2-15.8cN / tex, the evenness variation coefficient is 10.1%-11.8%, the 1000m cotton neps(+200%) is 15-35 / kilometer, and the 100000m yarn defect is 1 / 100000m.

[0031] The principle of the present application is as follows:

[0032] The present application adopts the progressive multi-stage carding clothing composed of the finishing tooth, the auxiliary carding tooth and the main carding tooth to card the viscose / silk noil, wherein the finishing tooth solves the cotton neps in the noil and removes the hard blocks, achieving the pre-carding and pre-finishing effect; the auxiliary carding tooth increases the carding tooth density and the carding points, and supports the fibers in the main carding tooth, which is beneficial to the transfer of the fibers to the flat, so that the noil fibers are more fully carded and better transferred. The working angle of the finishing tooth, the working angle of the auxiliary carding tooth and the working angle of the main carding tooth increase gradually, which gradually increases the carding and holding effect on the fibers, is beneficial to reducing the carding damage to the noil fibers containing more knot structures, and realizes the step-by-step progressive carding effect, so as to improve the noil carding quality.

[0033] In order to improve the yarn forming quality of the viscose / silk noil blended yarn, the present application adopts the sliver inversion and change-over pre-drawing-drawing process as shown in Figure 3 The carded sliver is inverted and changed over to be fed into the first pre-drawing machine, so that the carded sliver is changed from the front hook fibers to the back hook fibers, and after the second pre-drawing and the drawing machine, the sliver is fed into the carding machine, so that the fibers fed into the carding machine are the front hook (which is required in the carding process). Compared with the conventional pre-drawing-drawing-carding process as shown in Figure 4 The present application adopts the fiber inversion process, which on the one hand ensures that the fibers fed into the carding machine are mainly the front hook; on the other hand, the noil carded sliver is stretched by the second drawing, which is beneficial to improving the straightness of the noil fibers in the drawing, and the increase of the second drawing number is beneficial to improving the unevenness of the sliver fragments, so as to provide the guarantee for the yarn forming quality of the viscose / silk noil blended yarn.

[0034] The viscose / silk noil blended yarn obtained after the above carding and carding processes can obviously improve the yarn forming quality indexes such as the yarn count, the evenness and the strength.

[0035] Advantages:

[0036] (1) The preparation method of the viscose / silk floss blending yarn of the application, in the carding process, the progressive multi-stage carding clothing composed of the base and the tooth part arranged above the base is adopted, and the carded sliver is subjected to the inversion transposition pre-drawing method for the combing production, so that the quality of the viscose / silk floss blending yarn and the floss cotton blending ratio are effectively improved;

[0037] (2) The preparation method of the viscose / silk floss blending yarn of the application, through the adjacent carding process, pre-drawing process, sliver combining process and combing process, the straightness of the floss fiber in the sliver and the sliver evenness are effectively improved, so that the yarn count and the yarn quality of the viscose / silk floss blending yarn are improved;

[0038] (3) The preparation method of the viscose / silk floss blending yarn of the application, simple and easy to operate, high floss recycling ratio, high blending yarn yarn count and quality, good economic benefit and ecological environmental protection effect, in line with the green and circular development trend. BRIEF DESCRIPTION OF DRAWINGS

[0039] Figure 1 It is the front view of the progressive multi-stage carding clothing of the application;

[0040] Figure 2 It is the side view of the progressive multi-stage carding clothing of the application;

[0041] Figure 3 It is the pre-drawing-sliver combining-combing process flow schematic diagram of the application;

[0042] Figure 4 It is the pre-drawing-sliver combining-combing process flow schematic diagram of the prior art;

[0043] Among them, 1 is the base, 2 is the tooth part, 3 is the finishing tooth, 4 is the auxiliary carding tooth, and 5 is the main carding tooth. DETAILED DESCRIPTION

[0044] The application will be further described below in combination with specific embodiments. It should be understood that these embodiments are only used to illustrate the application and not to limit the scope of the application. In addition, it should be understood that after reading the content taught by the application, those skilled in the art can make various modifications or changes to the application, and these equivalent forms also fall within the scope defined by the claims attached to the application.

[0045] The test method involved in the embodiment is as follows:

[0046] Linear density deviation rate: test according to the standard of GB / T 4743-2009 "Textile package skein method for determination of linear density";

[0047] Single yarn breaking strength: test according to GB / T 3916-1997 "Textiles-determination of breaking force and elongation of single yarns in skein form" standard;

[0048] Coefficient of variation of evenness: test according to GB / T 3292.1-2008 "Textiles-determination of evenness of yarns-Part 1: Capacitance method" standard;

[0049] Nep count (+200%): test according to GB / T 3292.1-2008 "Textiles-determination of evenness of yarns-Part 1: Capacitance method" standard;

[0050] Defects per ten thousand meters: test according to GB / T 3292.1-2008 "Textiles-determination of evenness of yarns-Part 1: Capacitance method" standard.

[0051] Only some parameters closely related to the count of blended yarn, the proportion of viscose / silk floss blended back flower, and the quality of blended yarn are provided in the examples. It is found through experimental exploration that other parameters such as the rake angle and tooth tip angle of each tooth have little effect on the count of blended yarn, the proportion of viscose / silk floss blended back flower, and the quality of blended yarn, so the examples do not give them.

[0052] Example 1

[0053] A preparation method of viscose / silk back flower blended yarn, the specific steps are as follows:

[0054] (1) Selection of viscose / silk blended back flower;

[0055] The viscose / silk blended back flower adopts the cotton carding dust flower, the roving head opening flower, and the spinning air bellow flower generated in the process of producing viscose / silk blended yarn;

[0056] (2) Raw material selection and premixing;

[0057] The viscose / silk (mass ratio 84:16), viscose / silk (mass ratio 90:10) blended back flower, and new viscose fiber are arranged and cottoned and premixed according to the yarn forming requirements according to the mass ratio of 50:10:40;

[0058] (3) Opening and cleaning;

[0059] The above raw materials are opened, impurity-removed, and mixed using a JWF1009 type grabber, a JWF1029-160 type multi-bin cotton mixer, a JWF1115-160 type fine opening cotton machine, and a cotton feeder;

[0060] (4) Carding;

[0061] After opening and cleaning, the fibers are transported through pipes to the JWF1203 carding machine, where they are carded into slivers. The speed ratio of the carding machine cylinder to the licker-in roller is 1:2.23, and the sliver output speed is 100m / min.

[0062] Carding uses progressive multi-stage carding cloth, such as... Figure 1 As shown, the progressive multi-stage carding card cloth includes a base 1 and a toothed portion 2 disposed above the base 1;

[0063] The tooth part 2 includes main combing teeth 5, each main combing tooth 5 has an auxiliary combing tooth 4 on the front side of the tooth, and each main combing tooth 5 has a finishing tooth 3 on the back side of the tooth; the distance between the tip C of each main combing tooth 5 and the lower surface of the base 1 and the distance between the tip A of each finishing tooth 3 and the lower surface of the base 1 are both h1, and h1 is 1.8mm.

[0064] The front of each auxiliary comb tooth 4 is transitionally connected to the back of the combing tooth 3 on the main comb tooth 5 located in front of it, and the back of each auxiliary comb tooth 4 is transitionally connected to the front of the main comb tooth 5 located in front of it; the distance between the tip B of each auxiliary comb tooth 4 and the lower surface of the base 1 is h2, and h2 is 1.675mm; the tip B of each auxiliary comb tooth 4 is located in front of the tip C of the main comb tooth 5 located in front of it, and the distance between the two is L1, which is 0.12mm.

[0065] The front of each finishing tooth 3 is transitionally connected to the back of the main combing tooth 5 to which it belongs, and the back of each finishing tooth 3 is transitionally connected to the front of the auxiliary combing tooth 4 on a main combing tooth 5 behind the main combing tooth 5 to which it belongs; along the direction parallel to the lower surface of the base 1, the distance p between the tips A of two adjacent finishing teeth 3 is 1.8 mm, and the distance p2 between the tip A of each finishing tooth 3 and the tip C of the main combing tooth 5 to which it belongs is 0.75 mm.

[0066] The working angle of each combing tooth 3 is α1, the working angle of each auxiliary combing tooth 4 is α2, and the working angle of each main combing tooth 5 is α3. α1 is 5°, α2 is 20°, and α3 is 30°.

[0067] like Figure 2 As shown, the width b1 of the base 1 is 0.5 mm; the tooth width b2 of the finishing tooth 3, the tooth width of the auxiliary combing tooth 4, and the tooth width of the main combing tooth 5 are all 0.15 mm; the tooth tip width b4 of the finishing tooth 3 is 0.06 mm, the tooth tip width b3 of the auxiliary combing tooth 4 is 0.08 mm, and the tooth tip width of the main combing tooth 5 is 0.06 mm.

[0068] (5) Pre-combining strips;

[0069] The pre-drawing is carried out on a TMFD81S drawing frame, which includes a first pre-drawing process and a second pre-drawing process, wherein the dry weight of the sliver collected by the carding is 4.1 g / m, and the sliver is reversed before being input into the first pre-drawing machine, so that the sliver is changed from being dominated by front hook fibers to being dominated by rear hook fibers;

[0070] In the first pre-drawing, the number of drawing is 6, and the total draft ratio is 7.02 times; in the second pre-drawing, the number of drawing is 4, and the total draft ratio is 4.51 times;

[0071] (6) Sliver drawing;

[0072] The sliver drawing is carried out on an HC181D sliver drawing combined machine, the number of drawing is 24, the total draft ratio is 1.6 times, and the dry weight is 50 g / m;

[0073] (7) Combing;

[0074] The combing is carried out on an HC380H combing machine, the feed cotton has a length of 5.2 mm, and a dry weight of 22.0 g / 5 m, to form a mixed fiber combing sliver;

[0075] (8) Sliver drawing;

[0076] The sliver drawing is carried out on a TMFD81S sliver drawing machine, 6 combing slivers are fed, single-drawing is adopted, the draft ratio is 6.6 times, the sliver output speed is 300 m / min, and the dry weight is 20.0 g / 5 m;

[0077] (9) Roving;

[0078] The sliver prepared in step (8) is sent to a HY492C roving machine to be drafted and twisted to form a roving with a twist of 50 twists / m;

[0079] (10) Spinning;

[0080] The roving is further drafted and twisted on a DTM129 spinning machine by adopting a three-rubber-grid-ring negative pressure type siro spun process, a yarn with a twist factor of 357 is spun.

[0081] The final viscose / silk waste blended yarn has a count of 40S, a yarn linear density deviation rate of 0.3%, a single yarn breaking strength of 15.5 cN / tex, a sliver evenness variation coefficient of 10.1%, a thousand-meter neps (+200%) of 15 pieces / km, and a hundred-thousand-meter yarn defect of 1 piece / 100,000 m, and all the quality indexes reach the quality level of normal raw material yarns.

[0082] Comparative Example 1

[0083] A method for preparing a viscose / silk waste blended yarn, which is basically the same as that of Example 1, except that the following is adopted: Figure 4The conventional pre-drawing process shown has 6 drawn strips and a total draw ratio of 7.91.

[0084] The final viscose / silk blended yarn has a count of 40S, a yarn linear density deviation rate of 1.1%, a single yarn breaking strength of 13.6cN / tex, a yarn evenness variation coefficient of 12.2%, a kilometer neps (+200%) of 15 / km, and a yarn defect of 1 / 100,000m.

[0085] Comparing Example 1 with Comparative Example 1, it can be seen that when using the conventional pre-drawing process, only one drafting is performed on the comb sliver. Although the total drafting ratio is the same as that of two-drawing, the number of fused strands is reduced, which is not conducive to improving the unevenness of sliver segments. At the same time, two-drawing is more conducive to improving fiber straightness. Therefore, the yarn linear density deviation rate, breaking strength, and evenness CV value of Comparative Example 1 are not as good as those of Example 1.

[0086] Comparative Example 2

[0087] A method for preparing viscose / silk blended yarn is basically the same as in Example 1, except that in the carding cloth used for carding, α1, α2, and α3 are all 20°.

[0088] The final viscose / silk blended yarn has a count of 40S, a yarn linear density deviation rate of 0.8%, a single yarn breaking strength of 13.9cN / tex, a yarn evenness variation coefficient of 11.4%, and a kilometer neps (+200%) of 28 / km.

[0089] Comparing Example 1 with Comparative Example 2, it can be seen that when Comparative Example 2 uses a non-progressive multi-stage carding card cloth with the same working angle, the carding card cloth causes greater damage to the fibers, easily forming short fibers, resulting in a decrease in the quality of the carded sliver and thus a decrease in the quality of the yarn.

[0090] Comparative Example 3

[0091] A method for preparing viscose / silk recycled blended yarn is basically the same as in Example 1, except that the card cloth used for carding has no auxiliary carding teeth.

[0092] The final viscose / silk blended yarn has a count of 40S, a yarn linear density deviation rate of 0.7%, a single yarn breaking strength of 14.2cN / tex, a yarn evenness variation coefficient of 10.7%, a kilometer neps (+200%) of 18 / km, and a yarn defect of 1 / 100,000m.

[0093] Comparing Example 1 with Comparative Example 3, it can be seen that when using unassisted carding needle cloth, the high resistivity of silk fibers makes them difficult to transfer during the carding process, resulting in incomplete carding of recycled raw materials and a decline in yarn quality.

[0094] Comparative Example 4

[0095] A method for preparing viscose / silk recycled blended yarn is basically the same as in Example 1, except that the carding cloth used for carding has no finishing teeth.

[0096] The final viscose / silk blended yarn has a count of 40S, a yarn linear density deviation rate of 1.0%, a single yarn breaking strength of 13.2cN / tex, a yarn evenness variation coefficient of 11.0%, a kilometer neps (+200%) of 21 / km, and a yarn defect of 1 / 100,000m.

[0097] Comparing Example 1 with Comparative Example 4, it can be seen that when using carding cloth without combing teeth, without effectively loosening the recycled raw materials, simply increasing the combing points by auxiliary combing teeth will not only increase the damage to the fibers, but also make it difficult to remove many bundles of clump fibers, resulting in a decrease in yarn quality.

[0098] Example 2

[0099] A method for preparing viscose / silk recycled blended yarn, the specific steps of which are as follows:

[0100] (1) Selection of viscose / silk blended fabrics;

[0101] The waste paper for viscose / silk blended yarn production includes carding filter dust, sliver return from various processes, roving opening loosening, and fine yarn bellows.

[0102] (2) Raw material selection and premixing;

[0103] The recycled viscose / silk (mass ratio 84:16) and viscose / silk (mass ratio 90:10) blends are mixed with new viscose fibers at a mass ratio of 20:50:30 according to yarn requirements for packing, blending and pre-mixing.

[0104] (3) Open the cotton;

[0105] The above raw materials are opened, impurities removed, and mixed using a JWF1009 cotton grabber, a JWF1029-160 multi-bin cotton blender, a JWF1115-160 fine cotton opener, and a cotton feeder.

[0106] (4) Combing cotton;

[0107] After opening and cleaning, the fibers are transported through pipes to the JWF1203 carding machine, where they are carded into slivers. The speed ratio of the carding machine cylinder to the licker-in roller is 1:2.23, and the sliver output speed is 100m / min.

[0108] The carding process uses progressive multi-stage carding cloth, which includes a base and teeth set above the base.

[0109] The tooth portion comprises main carding teeth, each main carding tooth is provided with an auxiliary carding tooth on the tooth front face, and each main carding tooth is provided with a finishing tooth on the tooth back face; the distance between the tooth tip C of each main carding tooth and the lower surface of the base portion and the distance between the tooth tip A of each finishing tooth and the lower surface of the base portion are h1, and h1 is 1.8 mm;

[0110] The tooth front face of each auxiliary carding tooth is transitionally connected with the tooth back face of the finishing tooth on the front side of the main carding tooth on which the auxiliary carding tooth is located, and the tooth back face of each auxiliary carding tooth is transitionally connected with the tooth front face of the main carding tooth on which the auxiliary carding tooth is located; the distance between the tooth tip B of each auxiliary carding tooth and the lower surface of the base portion is h2, and h2 is 1.675 mm; the tooth tip B of each auxiliary carding tooth is located on the front side of the tooth tip C of the main carding tooth on which the auxiliary carding tooth is located, and the distance L1 between the two is 0.12 mm;

[0111] The tooth front face of each finishing tooth is transitionally connected with the tooth back face of the main carding tooth on which the finishing tooth is located, and the tooth back face of each finishing tooth is transitionally connected with the tooth front face of the auxiliary carding tooth on the main carding tooth on the rear side of the main carding tooth on which the finishing tooth is located; in the direction parallel to the lower surface of the base portion, the distance p between the tooth tips A of two adjacent finishing teeth is 1.8 mm, and the distance p2 between the tooth tip A of each finishing tooth and the tooth tip C of the main carding tooth on which the finishing tooth is located is 0.75 mm;

[0112] The working angle of each finishing tooth is α1, the working angle of each auxiliary carding tooth is α2, and the working angle of each main carding tooth is α3, α1 is 5°, α2 is 20°, and α3 is 30°;

[0113] The width b1 of the base portion is 0.5 mm; the tooth portion width b2 of the finishing tooth, the tooth portion width of the auxiliary carding tooth, and the tooth portion width of the main carding tooth are all 0.15 mm; the tooth crest width b4 of the finishing tooth is 0.06 mm, the tooth crest width b3 of the auxiliary carding tooth is 0.08 mm, and the tooth crest width of the main carding tooth is 0.06 mm;

[0114] (5) Pre-parallelizing;

[0115] The pre-parallelizing is performed on a TMFD81S type parallelizing machine, and the pre-parallelizing includes a first pre-parallelizing process and a second pre-parallelizing process, wherein the dry weight of the sliver collected by the carding is 4.1 g / m, and before the sliver is input into the first pre-parallelizing machine, the sliver canister is inverted and turned to make the sliver change from being dominated by front hook fibers to being dominated by rear hook fibers;

[0116] During the first pre-parallelizing, the number of parallelizing is 6, and the total draft ratio is 7.02 times; during the second pre-parallelizing, the number of parallelizing is 5, and the total draft ratio is 5.36 times;

[0117] (6) Sliver parallelizing and winding;

[0118] The process is carried out on an HC181D sliver combining machine, the number of combinations is 24, the total draft multiple is 1.6 times, and the dry basis weight is 50 g / m;

[0119] (7) combing;

[0120] The cotton lap is combed on an HC380H combing machine, the feed cotton has a length of 5.2 mm, the dry basis weight is 22.0 g / 5 m, and the mixed fiber combed sliver is formed;

[0121] (8) slivering;

[0122] The slivering is carried out on a TMFD81S type slivering machine, 6 combed slivers are fed, single lane slivering is adopted, the draft multiple is 6.6 times, the sliver output speed is 300 m / min, and the dry basis weight is 20.0 g / 5 m;

[0123] (9) roving;

[0124] The sliver prepared in step (8) is sent to a HY492C type roving machine for drafting and twisting to form a roving with a twist of 50 twists / m;

[0125] (10) spinning;

[0126] The roving is further drafted and twisted on a DTM129 type spinning machine by adopting a three-rubber-grid-ring negative pressure type siro spinning process, the spun yarn has a twist factor of 357, and the yarn is spun.

[0127] The final viscose / silk floss blended yarn has a count of 40S, a yarn linear density deviation rate of -0.2%, a single yarn breaking strength of 15.2 cN / tex, a evenness variation coefficient of 10.8%, a thousand-meter neps (+200%) of 19 per km, and a hundred-thousand-meter yarn defect of 1 per 100,000 m, and all the quality indexes reach the quality level of normal raw material yarns.

[0128] Example 3

[0129] A preparation method of a viscose / silk floss blended yarn, and the specific steps are as follows:

[0130] (1) viscose / silk floss blended floss selection;

[0131] The viscose / silk floss blended floss is the cotton combing dust filter floss, the sliver in each process, the roving head opening floss, the spinning air bellow floss, and the skin roller floss produced in the production of viscose / silk floss blended yarn;

[0132] (2) raw material selection and premixing;

[0133] The viscose / silk floss (mass ratio 84:16) floss and new viscose fibers are arranged, baled, and premixed according to the yarn formation requirement according to a mass ratio of 50:50;

[0134] (3) Opening and cleaning cotton;

[0135] The raw materials are opened, impurities are removed, and the materials are mixed by using a JWF1009 type cotton grabbing machine, a JWF1029-160 type multi-warehouse cotton mixing machine, a JWF1115-160 type fine opening cotton machine, and a cotton feeder;

[0136] (4) Carding cotton;

[0137] The fibers after opening and cleaning are transported to a JWF1203 carding machine through a pipeline, and are carded into slivers by the carding machine; the speed ratio of the cylinder and the licker-in of the carding machine is 1:2.15; the sliver output speed is 100 m / min;

[0138] The carding cotton adopts a progressive multi-stage carding clothing, which comprises a base and a tooth portion arranged above the base;

[0139] The tooth portion comprises main carding teeth, each main carding tooth is provided with an auxiliary carding tooth on the tooth front face, and each main carding tooth is provided with a finishing tooth on the tooth back face; the distance between the tooth tip C of each main carding tooth and the lower surface of the base and the distance between the tooth tip A of each finishing tooth and the lower surface of the base are both h1, and h1 is 1.8 mm;

[0140] The tooth front face of each auxiliary carding tooth is transitionally connected with the tooth back face of the finishing tooth on one main carding tooth on the front side of the main carding tooth where the auxiliary carding tooth is located, and the tooth back face of each auxiliary carding tooth is transitionally connected with the tooth front face of the main carding tooth where the auxiliary carding tooth is located; the distance between the tooth tip B of each auxiliary carding tooth and the lower surface of the base is h2, and h2 is 1.675 mm; the tooth tip B of each auxiliary carding tooth is located on the front side of the tooth tip C of the main carding tooth where the auxiliary carding tooth is located, and the distance L1 between the tooth tip B of each auxiliary carding tooth and the tooth tip C of the main carding tooth where the auxiliary carding tooth is located is 0.12 mm;

[0141] The tooth front face of each finishing tooth is transitionally connected with the tooth back face of the main carding tooth where the finishing tooth is located, and the tooth back face of each finishing tooth is transitionally connected with the tooth front face of the auxiliary carding tooth on one main carding tooth on the rear side of the main carding tooth where the finishing tooth is located; in the direction parallel to the lower surface of the base, the distance p between the tooth tips A of two adjacent finishing teeth is 1.8 mm, and the distance p2 between the tooth tip A of each finishing tooth and the tooth tip C of the main carding tooth where the finishing tooth is located is 0.75 mm;

[0142] The working angle of each finishing tooth is α1, the working angle of each auxiliary carding tooth is α2, and the working angle of each main carding tooth is α3, α1 is 5°, α2 is 20°, and α3 is 30°;

[0143] The width b1 of the base is 0.5 mm; the tooth portion width b2 of the finishing tooth, the tooth portion width of the auxiliary carding tooth, and the tooth portion width of the main carding tooth are all 0.15 mm; the tooth crest width b4 of the finishing tooth is 0.06 mm, the tooth crest width b3 of the auxiliary carding tooth is 0.08 mm, and the tooth crest width of the main carding tooth is 0.06 mm;

[0144] (5) Pre-drawing;

[0145] The pre-drawing was performed on a TMFD81S drawing frame, and the pre-drawing included a first pre-drawing process and a second pre-drawing process. The sliver collected by the carding machine with a dry weight of 4.5 g / m was inverted and turned before being input into the first pre-drawing machine, so that the sliver was changed from a majority of front hook fibers to a majority of rear hook fibers;

[0146] In the first pre-drawing, the number of combinations was 6, and the total draft ratio was 7.02 times. In the second pre-drawing, the number of combinations was 4, and the total draft ratio was 4.55 times.

[0147] (6) Sliver drawing;

[0148] The sliver drawing was performed on an HC181D sliver drawing combined machine, the number of combinations was 24, the total draft ratio was 1.6 times, and the dry weight was 50 g / m;

[0149] (7) Combing;

[0150] The combing was performed on an HC380H combing machine on the basis of the weight of the cotton roll, the feed cotton had a length of 5.2 mm, and the dry weight was 22.5 g / 5 m, so as to form a mixed fiber combing sliver.

[0151] (8) Sliver drawing;

[0152] The sliver drawing was performed on a TMFD81S sliver drawing machine by using 6 combing slivers as the feed, single-drawing, the draft ratio was 6.75 times, the sliver output speed was 300 m / min, and the dry weight was 20.0 g / 5 m.

[0153] (9) Roving;

[0154] The sliver prepared in step (8) was input into a HY492C roving machine to perform drafting and twisting, so as to form a roving with a twist of 50 twists / m.

[0155] (10) Spinning;

[0156] The roving was further drafted and twisted on a DTM129 spinning machine by using a three-rubber-grid-ring negative pressure type siro-spinning process, the spinning twist factor was 357, and the yarn was spun.

[0157] The final viscose / silk waste blended yarn had a count of 60S, a yarn linear density deviation rate of 0.5%, a single yarn breaking strength of 15.3 cN / tex, a evenness variation coefficient of 11.3%, a thousand-meter neps (+200%) of 30 per km, and a hundred-thousand-meter yarn defect of 1 per 100,000 m, and all the quality indexes reached the quality level of normal raw material yarns.

[0158] Example 4

[0159] A viscose / silk floss blending yarn preparation method, the specific steps are as follows:

[0160] (1) Viscose / silk blended floss selection;

[0161] The viscose / silk blended floss uses the cotton carding dust flower produced by producing seider / silk blended yarn, each process back strip, roving head opening flower, spinning air bellow flower, and skin roller flower;

[0162] (2) Raw material selection and premixing;

[0163] The seider / silk (mass ratio 72:28) floss and new viscose fiber are arranged, baled, cottoned and premixed according to the yarn forming requirement according to the mass ratio of 30:70;

[0164] (3) Opening and cleaning;

[0165] The above raw materials are opened, impurity-removed and mixed by using a JWF1009 type grab cotton machine, a JWF1029-160 type multi-bin cotton mixer, a JWF1115-160 type fine opening cotton machine and a cotton feeder;

[0166] (4) Carding;

[0167] The opened and cleaned fibers are conveyed to a JWF1203 carding machine through a pipeline, and are carded into slivers by the carding machine; the speed ratio of the carding machine cylinder and the carding machine licker-in is 1:2.1; the sliver output speed is 100 m / min;

[0168] The carding uses progressive multi-stage carding clothing, and the progressive multi-stage carding clothing comprises a base and a tooth portion arranged above the base;

[0169] The tooth portion comprises main carding teeth, each main carding tooth is provided with an auxiliary carding tooth on the tooth front face, and each main carding tooth is provided with a finishing tooth on the tooth back face; the distance between the tooth tip C of each main carding tooth and the lower surface of the base and the distance between the tooth tip A of each finishing tooth and the lower surface of the base are both h1, and h1 is 1.8 mm;

[0170] The tooth front face of each auxiliary carding tooth is transitionally connected with the tooth back face of the finishing tooth on the front side of the main carding tooth of the main carding tooth where the auxiliary carding tooth is located, and the tooth back face of each auxiliary carding tooth is transitionally connected with the tooth front face of the main carding tooth where the auxiliary carding tooth is located; the distance between the tooth tip B of each auxiliary carding tooth and the lower surface of the base is h2, and h2 is 1.675 mm; the tooth tip B of each auxiliary carding tooth is located on the front side of the tooth tip C of the main carding tooth where the auxiliary carding tooth is located, and the distance L1 between the two is 0.12 mm;

[0171] The tooth front of each finishing tooth is transitionally connected with the tooth back of the main carding tooth where the finishing tooth is located, and the tooth back of each finishing tooth is transitionally connected with the tooth front of the auxiliary carding tooth on one of the main carding teeth behind the main carding tooth where the finishing tooth is located; the distance p between the tooth tips A of two adjacent finishing teeth in the direction parallel to the lower surface of the base is 1.8 mm, and the distance p2 between the tooth tip A of each finishing tooth and the tooth tip C of the main carding tooth where the finishing tooth is located is 0.75 mm;

[0172] The working angle of each finishing tooth is α1, the working angle of each auxiliary carding tooth is α2, and the working angle of each main carding tooth is α3, α1 is 5°, α2 is 20°, and α3 is 30°;

[0173] The width b1 of the base is 0.5 mm; the tooth width b2 of the finishing tooth, the tooth width of the auxiliary carding tooth, and the tooth width of the main carding tooth are all 0.15 mm; the tooth top width b4 of the finishing tooth is 0.06 mm, the tooth top width b3 of the auxiliary carding tooth is 0.08 mm, and the tooth top width of the main carding tooth is 0.06 mm;

[0174] (5) Pre-drawing;

[0175] Pre-drawing is carried out on a TMFD81S drawing frame, and the pre-drawing includes a first pre-drawing process and a second pre-drawing process, wherein the dry weight of the sliver collected by the carding is 4.1 g / m, and before the sliver is input into the first pre-drawing machine, the sliver canister is inverted and turned to make the sliver change from being dominated by front hook fibers to being dominated by rear hook fibers;

[0176] During the first pre-drawing, the number of combinations is 6, and the total draft ratio is 7.01 times; during the second pre-drawing, the number of combinations is 4, and the total draft ratio is 4.55 times;

[0177] (6) Sliver drawing;

[0178] Sliver drawing is carried out on an HC181D sliver drawing combined machine, the number of combinations is 24, the total draft ratio is 1.62 times, and the dry basis weight is 48.6 g / m;

[0179] (7) Combing;

[0180] Combing is carried out on an HC380H combing machine, the cotton is fed backward, the feeding length is 4.7 mm, the dry weight is 22 g / 5 m, and the mixed fiber combed sliver is formed;

[0181] (8) Sliver drawing;

[0182] Sliver drawing is carried out on a TMFD81S drawing frame, 6 combed slivers are fed, single-drawing is adopted, the draft ratio is 6.9 times, the sliver output speed is 300 m / min, and the dry basis weight is 16.0 g / 5 m;

[0183] (9) Roving;

[0184] The sliver prepared in step (8) is sent to a HY492C roving frame to be drafted and twisted to form a roving with a twist of 61 twists / m;

[0185] (10) Spinning;

[0186] The roving is further drafted and twisted on a DTM129 spinning frame using a three-roller apron negative pressure type siro-compact spinning process to spin yarn with a twist factor of 357.

[0187] The final viscose / silk waste blended yarn has a count of 60S, a yarn linear density deviation rate of 0.9%, a single yarn breaking strength of 15.8 cN / tex, a evenness variation coefficient of 11.8%, a thousand meter neps (+200%) of 35 per km, and a hundred thousand meter yarn defect of 1 per 100,000 m, all of which reach the quality level of normal raw material yarn production.

Claims

1. A method for preparing viscose / silk recycled blended yarn, comprising adjacent carding processes, pre-drawing processes, sliver drawing and lapping processes, and combing processes, characterized in that, The carding process uses progressive multi-stage carding cloth, which includes a base and teeth set above the base. The tooth section includes main combing teeth, each main combing tooth has an auxiliary combing tooth on its front side, and each main combing tooth has a finishing tooth on its back side. The front of each auxiliary comb tooth transitions to the back of the combing tooth on the main comb tooth located in front of the main comb tooth, and the back of each auxiliary comb tooth transitions to the front of the main comb tooth located in front of the main comb tooth. The front of each combing tooth is connected to the back of the main combing tooth it belongs to, and the back of each combing tooth is connected to the front of the auxiliary combing tooth on a main combing tooth behind the main combing tooth it belongs to. The working angle of each combing tooth is α1, the working angle of each auxiliary combing tooth is α2, and the working angle of each main combing tooth is α3. α1, α2, and α3 increase in that order, with α1 being 5°, α2 being 20°, and α3 being 30°. The pre-drawing process includes a first pre-drawing process and a second pre-drawing process. In the first pre-drawing process, the sliver is fed into the pre-drawing machine in an inverted direction, so that the sliver changes from being dominated by front-hooked fibers to being dominated by rear-hooked fibers.

2. The method for preparing a viscose / silk recycled blended yarn according to claim 1, characterized in that, The distance between the tip C of each main combing tooth and the lower surface of the base, and the distance between the tip A of each finishing tooth and the lower surface of the base, are both h1. The distance between the tip B of each auxiliary combing tooth and the lower surface of the base is both h2. h1 is 1.8 mm and h2 is 1.675 mm.

3. The method for preparing a viscose / silk recycled blended yarn according to claim 1, characterized in that, The tip B of each auxiliary combing tooth is located in front of the tip C of the main combing tooth to which it belongs, and the distance L1 between them is 0.12mm.

4. The method for preparing a viscose / silk recycled blended yarn according to claim 1, characterized in that, The width of the base, b1, is 0.5 mm; the width of the teeth of the finishing teeth, b2, the width of the teeth of the auxiliary combing teeth, and the width of the teeth of the main combing teeth are all 0.15 mm; the width of the tooth tip of the finishing teeth, b4, is 0.06 mm; the width of the tooth tip of the auxiliary combing teeth, b3, is 0.08 mm; and the width of the tooth tip of the main combing teeth is 0.06 mm.

5. The method for preparing a viscose / silk recycled blended yarn according to claim 1, characterized in that, Along a direction parallel to the lower surface of the base, the distance p between the tips A of two adjacent finishing teeth is 1.8 mm.

6. The method for preparing a viscose / silk recycled blended yarn according to claim 1, characterized in that, The overall process flow is as follows: selection of viscose / silk blended recycled yarn → raw material selection and premixing → opening and cleaning → carding → first pre-drawing → second pre-drawing → sliver winding → combing → drawing → roving → spinning.

7. The method for preparing a viscose / silk recycled blended yarn according to claim 6, characterized in that, During carding, the fibers after opening and cleaning are transported to the carding machine through pipes, and then combed into slivers by the carding machine. The speed ratio of the carding machine cylinder to the licker-in roller is 1:2 to 2.

5.

8. The method for preparing a viscose / silk recycled blended yarn according to claim 6, characterized in that, During the first pre-coiling stage, the number of coiling strands is 6-7, and the total draft ratio is 6-8; during the second pre-coiling stage, the number of coiling strands is 4-5, and the total draft ratio is 4-6; during the coiling stage, the number of coiling strands is 12-24, and the total draft ratio is 1.5-2.

5.

9. The method for preparing a viscose / silk recycled blended yarn according to claim 1, characterized in that, The final viscose / silk recycled blended yarn has a count of not less than 32S, a viscose / silk recycled yarn content of not less than 40wt%, a yarn linear density deviation rate of -0.2~0.9%, a single yarn breaking strength of 15.2~15.8cN / tex, a yarn evenness variation coefficient of 10.1%~11.8%, 15~35 knots / km, and 1 defect / 100,000m.

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