CN117265713A - Spinning method for changing yarn structure - Google Patents
Spinning method for changing yarn structure Download PDFInfo
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- CN117265713A CN117265713A CN202311211057.1A CN202311211057A CN117265713A CN 117265713 A CN117265713 A CN 117265713A CN 202311211057 A CN202311211057 A CN 202311211057A CN 117265713 A CN117265713 A CN 117265713A
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- 238000009987 spinning Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 49
- 238000004804 winding Methods 0.000 claims abstract description 12
- 229920000742 Cotton Polymers 0.000 claims description 43
- 239000000835 fiber Substances 0.000 claims description 34
- 210000002268 wool Anatomy 0.000 claims description 28
- 239000004677 Nylon Substances 0.000 claims description 26
- 238000005452 bending Methods 0.000 claims description 26
- 229920001778 nylon Polymers 0.000 claims description 26
- 238000013461 design Methods 0.000 claims description 24
- 238000012856 packing Methods 0.000 claims description 16
- 244000025254 Cannabis sativa Species 0.000 claims description 15
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 15
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 15
- 235000009120 camo Nutrition 0.000 claims description 15
- 235000005607 chanvre indien Nutrition 0.000 claims description 15
- 239000011487 hemp Substances 0.000 claims description 15
- 229920000297 Rayon Polymers 0.000 claims description 14
- 229920004933 Terylene® Polymers 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 239000005020 polyethylene terephthalate Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
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- 238000005516 engineering process Methods 0.000 description 3
- 238000007378 ring spinning Methods 0.000 description 3
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H7/00—Spinning or twisting arrangements
- D01H7/92—Spinning or twisting arrangements for imparting transient twist, i.e. false twist
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
The invention relates to a spinning method for changing yarn structure, a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guiding hook, yarn strands formed by drawing rough yarns are output from the front roller, a downward inclination angle phi bypasses the lower part of the first circular belt to form a spinning section I, and then bypasses the upper part of the second circular belt to form a spinning section II, and yarns are obtained by winding after the yarn guiding hook; the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the designed twist coefficient of the yarn is 190-270, and the actual measured twist coefficient is 191-295. According to the spinning method for changing the yarn structure, the strands are twisted and untwisted twice under the action of the two circular belts, the dynamic twist of the yarn at the position close to the front roller jaw is increased due to the twisting action, and enough yarn forming tension is provided for the finished yarn, so that ultra-low twist yarn can be prepared, and the yarn breakage is small; the yarn body of the yarn prepared by the method is fluffy, soft in hand feeling and clear in fabric texture.
Description
Technical Field
The invention belongs to the technical field of textile processing, and relates to a spinning method for changing a yarn structure.
Background
With the development of textile market and innovation of textile fabric, consumers more pursue the performance price of the clothing fabric, and the improvement of pursuit quality from the focused satisfaction is presented. The soft textile can bring comfort to human body and mind, and effectively relieve physical and psychological fatigue, stress and anxiety of modern high-pressure working population.
The prior soft finishing modes of the textile comprise: (1) Chemical finishing, namely, changing a crystallization area of the fiber by using a chemical reagent to soften the fiber, or coating a surfactant on the surface of the fabric, so that the fabric plays a role in lubrication when rubbed with a human body, and the chemical finishing can obtain a good softening effect but has great environmental pollution; (2) The method is a passive soft finishing method, and the finishing process is an environment-friendly finishing mode without chemical auxiliary agents, but is irreversible to the damage and the destruction of the fabric in the whole finishing process.
The traditional ring spinning thread structure has the characteristic of 'internal tightness and external looseness', the yarn feel is hard, and the fabric softness is poor. The method for changing the yarn structure to change the softness of the fabric avoids pollution caused by chemical finishing, reduces the subsequent procedures of physical finishing, reduces the production cost and realizes real green environmental protection.
Patent CN103361786 discloses a method and a device for applying false twist to a yarn before ring spinning, downstream of a front roller, pulling the twisted yarn sequentially across a first and a second run of a travelling endless belt, such that the yarn wraps around a first convex surface of the first run and then passes between the first and the second run before wrapping around a second convex surface of the second run. Friction between each of the first and second convex surfaces and the yarn imparts false twist in a common direction and requires each of the first and second endless belts to have respective linear runs that are substantially parallel to each other such that the linear runs can be aligned parallel to the front draw rolls. Compared with the traditional ring spinning, the parallel-arrangement annular belt false twisting method can form yarns with lower residual torque, which leads to a knitted fabric with soft hand feeling, but when the technology is applied to the woven fabric, the soft characteristic is not obvious, the root cause is that the technology does not change the characteristic of 'internal tightness and external looseness' of the yarns, and the technology is suitable for producing low-twist yarns with the twist coefficient of 280-320, when the ultra-low-twist yarns with the twist coefficient of 280 or less are produced to prepare softer fabrics, yarn breakage is caused by insufficient spinning tension, the quality of the yarns is reduced, the normal use of the following procedures cannot be ensured, and meanwhile, the fabric lines are not clear due to the lower twist coefficient of the ultra-low-twist yarns.
In order to solve the above problems, it is necessary to develop a spinning method for changing the yarn structure so that the product has soft and fluffy characteristics.
Disclosure of Invention
The invention aims to solve the problems that the yarn structure in the prior art cannot be changed, ultra-low twist yarn cannot be prepared to produce soft fabrics and the surface texture under ultra-low twist is unclear, and provides a spinning method for changing the yarn structure.
In order to achieve the above purpose, the invention adopts the following technical scheme:
a spinning method for changing yarn structure is characterized in that a first circular belt and a second circular belt are sequentially arranged between a front roller and a yarn guide hook of a spinning frame, yarn strands formed by the drafted roving are output from the front roller, a downward inclination angle phi (namely an angle phi with a conveying path before the yarn strands are conveyed to the front roller) firstly bypasses the lower part of the first circular belt to form a spinning section I, then a spinning section II is formed by bypassing the upper part of the second circular belt, and the yarn is obtained by winding after the yarn guide hook;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively;
the linear speed ratio (V1/V2, namely the linear speed ratio) of the first circular belt and the second circular belt is 1.5-8.5, and the yarn spun in the range has larger actual measurement twist coefficient;
phi is 15-30 degrees, and the yarn whisker strip contacts with the first circular belt to form a surrounding angle theta 1 45-60 degrees, and an enclosing angle theta formed by the contact of the yarn whisker strip and the second circular belt 2 60-75 DEG and theta 1 <θ 2 ；
θ 1 、θ 2 The size of (2) influences false twisting efficiency, and theoretically, the larger the surrounding angle is, the higher the false twisting efficiency is, so that yarn forming is facilitated under the ultralow-twist spinning state of the yarn. However, in the actual production, the larger the wrapping angle is, the more difficult the yarn joint is, and therefore, the above wrapping angle is set.
As a preferable technical scheme:
according to the spinning method for changing the yarn structure, when the yarn is Z-twisted, the first circular belt horizontally moves leftwards, and the second circular belt horizontally moves rightwards; when the yarn is S-twisted, the first circular band moves horizontally to the right and the second circular band moves horizontally to the left.
In the spinning method for changing the yarn structure, the speeds of the first circular belt and the second circular belt are independently controlled.
The spinning method for changing the yarn structure comprises the step of spinning more than one of natural fibers (cotton, hemp, silk and the like) and artificial fibers (viscose, tencel, modal, terylene, chinlon and the like) as yarn whisker materials.
In the spinning method for changing the yarn structure, the twist factor of the roving is 102-105 and the ration is 4-10 g/10m.
According to the spinning method for changing the yarn structure, the center distance between the first circular belt and the front roller is 5-44 mm, the center distance between the second circular belt and the front roller is 9-60 mm, the center distance between the first circular belt and the second circular belt is 4-16 mm, the linear velocity ratio of the first circular belt to the front roller is 1-21, and the linear velocity ratio of the second circular belt to the front roller is 0.7-14.
The spinning method for changing yarn structure according to any one of the above, wherein the design twist factor of the yarn is 190-270, the actual measured twist factor is 191-295, and the yarn is ultra-low twist yarn, while the yarn whisker between the front roller and the yarn guiding hook is not enough in tension when the ultra-low twist yarn is produced by the method of the prior art, so that the yarn cannot be formed;
in order to overcome the defect that the broken ends of the ultra-low twist yarns cannot be formed into yarns, firstly, the invention is provided with two circular belts which are contacted with yarn strands between the front roller and the yarn guide hook and generate tangential friction force on the yarn strands, so that the spinning tension is increased, and the broken ends are reduced to prepare the ultra-low twist yarns; secondly, controlling the speed of the two circular belts and the contact angle between the two circular belts and the yarn whisker so that the friction force generated by the first circular belt is larger than that generated by the second circular belt, so that the twist of the spinning section I is larger than that of the spinning section II, and the two sections of twist directions are opposite, and therefore, the dynamic twist in the spinning process can be slowly released to obtain a relatively uniform structure (the radial stacking density centralization range is increased) and soft hand feeling (the bending stiffness is reduced) of the yarn;
in order to avoid yarn breakage due to excessive spinning tension, it is preferable that the ratio of the linear velocity of each round belt to the linear velocity of the front roller is 1 to 21, and the wrapping angle θ formed by the contact of the yarn strand and the first round belt is considered in view of yarn joining problem 1 45-60 degrees, and an enclosing angle theta formed by the contact of the yarn whisker strip and the second circular belt 2 60-75 DEG and theta 1 <θ 2 ) The actually measured twist coefficient is 191-295, and compared with the prior art, the fiber in the yarn has larger twist coefficient, so that the cloth cover texture obtained by weaving the yarn is clearer;
the yarn diameter is increased by 5% -25% compared with a comparison sample, the preparation method of the comparison sample is basically the same as that of the yarn, and the difference is that yarn strands formed after the roving is drafted are directly fed into a yarn guiding hook and then wound after being output from a front roller;
the radius of the axial spiral track of the fiber in the yarn is 3-20% of the diameter of the yarn, and the radial packing density centering range of the fiber in the yarn is 45-55% of the radius of the yarn.
The spinning method for changing the yarn structure is characterized in that the yarn is pure yarn, blended yarn or composite yarn, and the design count of the yarn is 6S-32S.
In the spinning method for changing the yarn structure, when the material of the yarn is cotton, the relative bending stiffness is 1.7X10 -4 ～3.5×10 -4 gf·cm·tex -1 The breaking strength is 12.5-16.5 cN/tex; when the yarn is made of hemp, the relative bending rigidity is 4.5X10 -4 ～9.5×10 -4 gf·cm·tex -1 The breaking strength is 16-26 cN/tex; when the yarn is made of silk, the relative bending rigidity is 2.5 multiplied by 10 -4 ～3.1×10 -4 gf·cm·tex -1 The breaking strength is 18-21 cN/tex; when the yarn is made of viscose, the relative bending rigidity is 2.0×10 -4 ～3.1×10 -4 gf·cm·tex -1 The breaking strength is 12-14 cN/tex; when the yarn is made of wool, the relative bending rigidity is 1.1X10 -4 ～1.5×10 -4 gf·cm·tex -1 The breaking strength is 6-9 cN/tex; when the yarn is made of nylon, the relative bending rigidity is 1.3 multiplied by 10 -4 ～1.5×10 -4 gf·cm·tex -1 The breaking strength is 23-35 cN/tex; when the yarn is made of wool/cotton (20/80) blend, the relative bending rigidity is 1.1X10 -4 ～3.5×10 -4 gf·cm·tex -1 The breaking strength is 10 to 13cN/tex; when the yarn is made of nylon/cotton (50/50) blending, the relative bending rigidity is 1.3 multiplied by 10 -4 ～3.5×10 -4 gf·cm·tex -1 The breaking strength is 18 to 25cN/tex; when the yarn is made of terylene, the relative bending rigidity is 5.5 multiplied by 10 -4 ～5.8×10 - 4 gf·cm·tex -1 The breaking strength is 25-30 cN/tex.
The principle of the invention:
under the ultralow twist state, the yarn whisker is extremely easy to break due to insufficient yarn tension in the spinning process, the spinnability is poor, the yarn twist coefficient is smaller, and the fabric lines are not clear.
The invention creatively designs a spinning method for changing yarn structure, which is characterized in that the strands are twisted and untwisted twice under the action of two circular belts (the first circular belt is twisted with the strands above the first circular belt after being contacted with the yarn, the untwisting action is performed below the first circular belt, and the second circular belt is the same), the twisting action increases the dynamic twist of the yarn near a front roller jaw, and provides enough yarn forming tension for the finished yarn, so that ultra-low twist yarn (twist coefficient 190-270) can be prepared, and the yarn breakage is less; under the repeated untwisting action, the radius of the spiral track of the yarn is reduced, the structure is fluffy, the diameter is increased, and the yarn body has soft hand feeling. The degree of twisting-untwisting is controlled to be different for two times, the dynamic twist degree reduction degree of heavy spinning process is reduced, the torque is slowly released when the yarn is formed, the tension of the formed yarn is stabilized, and the quality of the formed yarn is ensured. Simultaneously, because the friction of two circular belts to the surface of the yarn body, the actually measured twist coefficient of the yarn is increased, and the fabric lines are clear. The yarn spinning method is simple and easy to operate, the softness and the fluffiness of the yarn are obviously improved, and the fabric lines are clear.
The beneficial effects are that:
(1) According to the spinning method for changing the yarn structure, the strands are twisted and untwisted twice under the action of the two circular belts, the dynamic twist of the yarn near the jaw of the front roller is increased due to the twisting action, and enough yarn forming tension is provided for the finished yarn, so that ultra-low twist yarns (the twist coefficients are 190-270) can be prepared, and the yarn breakage is small;
(2) The yarn body of the yarn prepared by the invention is fluffy, soft in hand feeling and clear in fabric texture;
(3) The spinning method for changing the yarn structure is simple and easy to operate, the softness and the fluffiness of the yarn are obviously improved, the yarn twist coefficient is increased, and the fabric lines are clear.
Drawings
FIG. 1 is a schematic representation of the yarn preparation of the present invention;
FIG. 2 is a side view of a yarn strand from a front roller to a second round belt spinning path;
FIG. 3 is a schematic view of the spatial position of a first circular band and a second circular band;
FIG. 4 is a graph showing the axial morphology of the yarns of comparative example 1 and example 1;
FIG. 5 is a graph comparing the radial morphology of the yarns of comparative example 4 and example 4;
FIG. 6 is a graph showing the density distribution of the yarn package of comparative example 1 and example 1;
FIG. 7 is a graph showing the degree of inclination of the surface layer fibers of comparative sample 9 and example 9;
FIG. 8 is a schematic representation of the yarn preparation mechanism of the present invention;
wherein, 1-yarn whisker, 2-front roller, 3-first round belt, 4-second round belt, 5-yarn guiding hook and 6-yarn.
Detailed Description
The invention is further described below in conjunction with the detailed description. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. Further, it is understood that various changes and modifications may be made by those skilled in the art after reading the teachings of the present invention, and such equivalents are intended to fall within the scope of the claims appended hereto.
The test method of the invention is as follows:
radial stacking density centering range: after the cross section of the yarn is obtained by CT scanning, the radial packing density of the fibers in the yarn is calculated by adopting an equidistant concentric circle method, and when the packing density of the fibers in a certain circular ring is higher than the packing density in an adjacent circular ring of the outer layer by 0.05 for the first time from the center of the yarn to the periphery of the yarn, the radius range of the circular ring is defined as the radial packing density centralization range of the yarn.
Relative flexural rigidity: the test was performed using a KES-FB2-S bend tester.
Breaking strength: according to GB/T3916-2013 (measurement of single yarn breaking strength and breaking elongation of textile package yarn (CRE method)), YYG063 full-automatic single yarn strength tester is adopted for testing.
Example 1
A spinning method for changing yarn structure, the design count of yarn is 6S, the design twist coefficient is 200, as shown in figure 1, the specific spinning process is as follows:
as shown in fig. 2 and 3, a first circular belt 3 and a second circular belt are sequentially arranged between a front roller 2 and a yarn guiding hook 5 of a spinning frame, yarn strands 1 formed by drafting cotton roving are output from the front roller 2, are firstly inclined downwards by 15 degrees to bypass the lower part of the first circular belt 3 to form a spinning section I, and then bypass the upper part of the second circular belt to form a spinning section II, and are wound after passing through the yarn guiding hook 5 to obtain cotton yarns 6;
the first circular belt 3 and the second circular belt move transversely to apply tangential friction force to the contacted yarn whisker 1 respectively; the cotton yarn 6 is Z-twisted, the first round belt 3 moves horizontally leftwards, and the second round belt moves horizontally rightwards;
the twist factor of the roving is 102, and the ration is 10g/10m; the yarn strand 1 contacts the first round belt 3 to form a wrap angle theta 1 45 degrees, the yarn strand 1 contacts with the second round belt to form a surrounding angle theta 2 60 °; the center distance between the first circular belt 3 and the front roller 2 is 5mm, the center distance between the second circular belt and the front roller 2 is 21mm, the center distance between the first circular belt 3 and the second circular belt 4 is 16mm, the speeds of the first circular belt 3 and the second circular belt 4 are independently controlled, the ratio of the speed of the first circular belt 3 to the linear speed of the front roller 2 is 21, and the speed of the second circular belt 4 and the linear speed of the front roller 2 are respectively controlledThe ratio of the pull 2 linear speed is 2.5, and the linear speed ratio of the first circular belt 3 to the second circular belt 4 is 8.4;
preparing a comparison sample 1, wherein the preparation method of the comparison sample 1 is basically the same as that of the cotton yarn, and is only different in that yarn strands formed by drawing roving made of cotton are directly fed into a yarn guide hook for winding after being output from a front roller; the average diameter of the prepared comparative sample 1 was 374. Mu.m;
the measured count of the obtained cotton yarn is 6S, and the measured twist coefficient is 205; as shown in fig. 4, the average diameter of the cotton yarn was 468 μm, which is 25% greater than that of comparative sample 1; the average diameter of the cotton yarn is obviously larger than that of the comparative sample 1, and the distribution of fibers in the yarn is relatively loose, so that the yarn body of the cotton yarn is fluffy and soft in hand feeling. The radius of the axial spiral track of the fiber in the cotton yarn is 20% of the diameter of the cotton yarn, and the centralization range of the radial packing density of the fiber in the cotton yarn is 55% of the radius of the cotton yarn; the relative flexural rigidity of the cotton yarn was 1.7X10 -4 gf·cm·tex -1 The breaking strength was 13cN/tex.
As shown in fig. 6, the packing density centering range of the comparative sample 1 is concentrated near the yarn core (at the horizontal axis 0), the packing density centering range of the yarn is concentrated within 50% of the yarn radius, and the fiber packing density of the yarn is relatively uniform throughout from the yarn core to the yarn surface (at the horizontal axis 500), especially within 0 to 200pixel, which means that the fiber distribution in the yarn is relatively dispersed, which leads to fluffiness of the yarn and enhances the softness of the yarn.
Example 2
The spinning method for changing the yarn structure has the design count of 7S and the design twist coefficient of 220, and the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed by drawing rough yarns made of hemp are output from the front roller, the yarns firstly incline downwards by 15 degrees and bypass the lower part of the first circular belt to form a spinning section I, then bypass the upper part of the second circular belt to form a spinning section II, and the yarns are wound after passing through the yarn guide hook to obtain hemp yarns;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the hemp yarn is S-twisted, the first circular belt horizontally moves right, and the second circular belt horizontally moves left;
the twist factor of the roving is 102, and the ration is 8g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 45 degrees, the yarn strand contacts with the second round belt to form a surrounding angle theta 2 60 °; the center distance between the first circular belt and the front roller is 10mm, the center distance between the second circular belt and the front roller is 14mm, the center distance between the first circular belt and the second circular belt is 4mm, the speeds of the first circular belt and the second circular belt are independently controlled, the ratio of the speed of the first circular belt to the linear speed of the front roller is 16, the ratio of the speed of the second circular belt to the linear speed of the front roller is 10, and the linear speed ratio of the first circular belt and the second circular belt is 1.6;
preparing a comparison sample 2, wherein the preparation method of the comparison sample 2 is basically the same as that of the hemp yarn, and is only different in that yarn strands formed by drawing rough yarns made of hemp are directly fed into a yarn guide hook for winding after being output from a front roller; the average diameter of the comparative sample 2 obtained was 266. Mu.m;
the actual measured count of the obtained hemp yarn is 7S, and the actual measured twist coefficient is 228; the average diameter of the hemp yarn is 319 mu m, which is increased by 20% compared with the comparative sample 2; the radius of the axial spiral track of the fiber in the hemp yarn is 16% of the diameter of the hemp yarn, and the radial packing density centering range of the fiber in the hemp yarn is 53% of the radius of the hemp yarn; the relative bending rigidity of the hemp yarn is 4.8X10 -4 gf·cm·tex -1 The breaking strength was 18cN/tex.
Example 3
A spinning method for changing yarn structure, the design count of yarn is 16S, the design twist coefficient is 230, the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed after the roving made of silk is drawn are output from the front roller, the yarn strands firstly incline downwards by 15 degrees and bypass the lower part of the first circular belt to form a spinning section I, then bypass the upper part of the second circular belt to form a spinning section II, and silk yarns are obtained after winding through the yarn guide hook;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the silk yarn is Z-twisted, the first circular belt horizontally moves leftwards, and the second circular belt horizontally moves rightwards;
the twist factor of the roving is 103, and the ration is 6g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 45 degrees, the yarn strand contacts with the second round belt to form a surrounding angle theta 2 60 °; the center distance between the first circular belt and the front roller is 20mm, the center distance between the second circular belt and the front roller is 26mm, the center distance between the first circular belt and the second circular belt is 6mm, the speeds of the first circular belt and the second circular belt are independently controlled, the ratio of the speed of the first circular belt to the linear speed of the front roller is 10, the ratio of the speed of the second circular belt to the linear speed of the front roller is 6, and the linear speed ratio of the first circular belt and the second circular belt is 1.7;
preparing a comparison sample 3, wherein the preparation method of the comparison sample 3 is basically the same as that of the silk yarn, and is only different in that yarn strands formed by drawing silk roving are directly fed into a yarn guide hook for winding after being output from a front roller; the average diameter of the prepared comparative sample 3 was 246. Mu.m;
the actual measured count of the prepared silk yarn is 16S, and the actual measured twist coefficient is 234; the average diameter of silk yarn is 283 mu m, which is 15% increased compared with the comparative sample 3; the radius of the axial spiral track of the fiber in the silk yarn is 13% of the diameter of the silk yarn, and the radial packing density centralization range of the fiber in the silk yarn is 50% of the radius of the silk yarn; the relative bending rigidity of the silk yarn is 2.9 multiplied by 10 -4 gf·cm·tex -1 The breaking strength was 19cN/tex.
Example 4
A spinning method for changing yarn structure, the design count of yarn is 16S, the design twist coefficient is 190, the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed after a roving made of viscose is drawn are output from the front roller, the yarn strands firstly incline downwards by 15 degrees and bypass the lower part of the first circular belt to form a spinning section I, then bypass the upper part of the second circular belt to form a spinning section II, and viscose yarns are obtained after winding through the yarn guide hook;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the viscose yarn is S-twisted, the first circular belt horizontally moves right, and the second circular belt horizontally moves left;
the twist factor of the roving is 103, and the ration is 6g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 45 degrees, the yarn strand contacts with the second round belt to form a surrounding angle theta 2 60 °; the center distance between the first circular belt and the front roller is 30mm, the center distance between the second circular belt and the front roller is 38mm, the center distance between the first circular belt and the second circular belt is 8mm, the speeds of the first circular belt and the second circular belt are independently controlled, the ratio of the first circular belt speed to the front roller is 18, the ratio of the second circular belt speed to the front roller is 9, and the ratio of the first circular belt to the second circular belt is 2;
preparing a comparison sample 4, wherein the preparation method of the comparison sample 4 is basically the same as that of the viscose yarn, and the difference is that yarn strands formed by drafting the roving made of viscose are directly fed into a yarn guide hook for winding after being output from a front roller; as shown in FIG. 5, the average diameter of the comparative sample 4 was 230. Mu.m;
the actual measured count of the yarn is 16S, and the actual measured twist coefficient is 191; as shown in fig. 5, the average diameter of the viscose yarn is 253 μm, which is increased by 10% compared with the comparative sample 4; the radius of the axial spiral track of the fiber in the viscose yarn is 9% of the diameter of the viscose yarn, and the centralization range of the radial packing density of the fiber in the viscose yarn is 46% of the radius of the viscose yarn; the relative bending rigidity of the viscose yarn is 2.0 multiplied by 10 -4 gf·cm·tex -1 The breaking strength was 13cN/tex.
Example 5
A spinning method for changing yarn structure, the design count of yarn is 16S, the design twist coefficient is 270, the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed by drawing rough yarns made of wool are output from the front roller, the yarns firstly incline downwards by 15 degrees and bypass the lower part of the first circular belt to form a spinning section I, then bypass the upper part of the second circular belt to form a spinning section II, and the yarns are wound after passing through the yarn guide hook to obtain wool yarns;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the wool yarn is Z-twisted, the first circular belt horizontally moves leftwards, and the second circular belt horizontally moves rightwards;
the twist factor of the roving is 104, and the ration is 6g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 45 degrees, the yarn strand contacts with the second round belt to form a surrounding angle theta 2 60 °; the center distance between the first circular belt and the front roller is 30mm, the center distance between the second circular belt and the front roller is 38mm, the center distance between the first circular belt and the second circular belt is 8mm, the speeds of the first circular belt and the second circular belt are independently controlled, the ratio of the speed of the first circular belt to the linear speed of the front roller is 12, the ratio of the speed of the second circular belt to the linear speed of the front roller is 4, and the linear speed ratio of the first circular belt and the second circular belt is 3;
preparing a comparison sample 5, wherein the preparation method of the comparison sample 5 is basically the same as that of the wool yarn, and is only different in that yarn strands formed by drawing roving made of wool are directly fed into a yarn guide hook for winding after being output from a front roller; the average diameter of the prepared comparative sample 5 was 241. Mu.m;
the actual measured count of the prepared wool yarn is 16S, and the actual measured twist coefficient is 276; the average diameter of the wool yarn is 270 mu m, which is increased by 12% compared with the comparative sample 5; the radius of the axial spiral track of the fiber in the wool yarn is 11% of the diameter of the wool yarn, and the radial packing density centralization range of the fiber in the wool yarn is 50% of the radius of the wool yarn; the relative bending rigidity of the wool yarn is 1.2 multiplied by 10 -4 gf·cm·tex -1 The breaking strength was 8cN/tex.
Example 6
The spinning method for changing the yarn structure has the design count of 32S and the design twist coefficient of 270, and the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed by drawing nylon roving are output from the front roller, the yarns firstly incline downwards by 20 degrees and bypass the lower part of the first circular belt to form a spinning section I, then bypass the upper part of the second circular belt to form a spinning section II, and the yarns are wound after passing through the yarn guide hook to obtain nylon yarns;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the nylon yarn is Z-twisted, the first circular belt horizontally moves leftwards, and the second circular belt horizontally moves rightwards;
the twist factor of the roving is 104, and the ration is 4.8g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 At 50 DEG, the yarn strand forms a wrap angle theta with the second round belt 2 70 °; the center distance between the first circular belt and the front roller is 35mm, the center distance between the second circular belt and the front roller is 45mm, the center distance between the first circular belt and the second circular belt is 10mm, the speeds of the first circular belt and the second circular belt are independently controlled, the ratio of the speed of the first circular belt to the linear speed of the front roller is 12, the ratio of the speed of the second circular belt to the linear speed of the front roller is 4, and the linear speed ratio of the first circular belt and the second circular belt is 3;
preparing a comparison sample 6, wherein the preparation method of the comparison sample 6 is basically the same as that of the nylon yarn, and is only different in that yarn strands formed by drawing roving made of nylon are directly fed into a yarn guide hook for winding after being output from a front roller; the average diameter of the prepared comparative sample 6 was 129. Mu.m;
the actual measured count of the prepared nylon yarn is 32S, and the actual measured twist coefficient is 280; the average diameter of the nylon yarn is 139 mu m, which is increased by 8% compared with the comparative sample 6; the radius of the axial spiral track of the fiber in the nylon yarn is 6% of the diameter of the nylon yarn, and the centering range of the radial stacking density of the fiber in the nylon yarn is 46% of the radius of the nylon yarn; the relative bending rigidity of the nylon yarn is 1.4 multiplied by 10 -4 gf·cm·tex -1 The breaking strength was 23cN/tex.
Example 7
The spinning method for changing the yarn structure has the design count of 32S and the design twist coefficient of 270, and the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed by drawing roving made of wool and cotton (mass ratio is 20/80) are output from the front roller, the yarn strands incline downwards by 20 degrees to bypass the lower part of the first circular belt to form a spinning section I, and then bypass the upper part of the second circular belt to form a spinning section II, and the spinning section II is wound after passing through the yarn guide hook to obtain wool/cotton blended yarns;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the wool/cotton blended yarn is Z-twisted, the first circular belt horizontally moves leftwards, and the second circular belt horizontally moves rightwards;
the twist factor of the roving is 105, and the ration is 4.5g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 At 50 DEG, the yarn strand forms a wrap angle theta with the second round belt 2 70 °; the center distance between the first circular belt and the front roller is 35mm, the center distance between the second circular belt and the front roller is 45mm, the center distance between the first circular belt and the second circular belt is 10mm, the speeds of the first circular belt and the second circular belt are independently controlled, the ratio of the speed of the first circular belt to the linear speed of the front roller is 10, the ratio of the speed of the second circular belt to the linear speed of the front roller is 3, and the linear speed ratio of the first circular belt and the second circular belt is 3.3;
preparing a comparison sample 7, wherein the preparation method of the comparison sample 7 is basically the same as that of the wool/cotton blended yarn, and is only different in that yarn strands formed by drawing roving made of wool and cotton (mass ratio of 20/80) are directly fed into a yarn guiding hook and wound after being output from a front roller; the average diameter of the prepared comparative sample 7 was 160. Mu.m;
the actual measured count of the obtained wool/cotton yarn is 32S, and the actual measured twist coefficient is 282; the average diameter of the wool/cotton yarn is 170 mu m, which is increased by 6% compared with the comparative sample 7; the radius of the axial spiral track of the fiber in the wool/cotton yarn is 5% of the diameter of the wool/cotton yarn, and the radial packing density centering range of the fiber in the wool/cotton yarn is 43% of the radius of the wool/cotton yarn; the relative flexural rigidity of wool/cotton yarn was 1.8X10 -4 gf·cm·tex -1 The breaking strength was 12cN/tex.
Example 8
The spinning method for changing the yarn structure has the design count of 32S and the design twist coefficient of 270, and the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed by drawing roving made of nylon and cotton (with the mass ratio of 50/50) are output from the front roller, the yarn strands are firstly inclined downwards by 30 degrees to bypass the lower part of the first circular belt to form a spinning section I, then bypass the upper part of the second circular belt to form a spinning section II, and the spinning section II is wound after passing through the yarn guide hook to obtain nylon/cotton blended yarns;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the nylon/cotton blended yarn is Z-twisted, the first circular belt horizontally moves leftwards, and the second circular belt horizontally moves rightwards;
the twist factor of the roving is 105, and the ration is 4.5g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 At 60 degrees, the yarn strand contacts with the second round belt to form a surrounding angle theta 2 75 °; the center distance between the first circular belt and the front roller is 40mm, the center distance between the second circular belt and the front roller is 52mm, the center distance between the first circular belt and the second circular belt is 12mm, the speeds of the first circular belt and the second circular belt are independently controlled, the ratio of the speed of the first circular belt to the linear speed of the front roller is 6, the ratio of the speed of the second circular belt to the linear speed of the front roller is 2, and the linear speed ratio of the first circular belt and the second circular belt is 3;
preparing a comparison sample 8, wherein the preparation method of the comparison sample 8 is basically the same as that of the nylon/cotton blended yarn, and is only different in that yarn strands formed by drawing roving made of nylon and cotton (the mass ratio is 50/50) are directly fed into a yarn guiding hook and wound after being output from a front roller; the average diameter of the prepared comparative sample 8 was 171. Mu.m;
the actual measured count of the yarn is 32S, and the actual measured twist coefficient is 280; the average diameter of the nylon/cotton blended yarn is 180 mu m, which is increased by 5% compared with the comparative sample 8; the radius of the axial spiral track of the fiber in the nylon/cotton blended yarn is 5% of the diameter of the yarn, and the radial stacking density centering range of the fiber in the nylon/cotton blended yarn is 45% of the radius of the nylon/cotton blended yarn; the relative bending rigidity of the nylon/cotton blended yarn is 1.7X10 -4 gf·cm·tex -1 The breaking strength was 18cN/tex.
Example 9
The spinning method for changing the yarn structure has the design count of 32S and the design twist coefficient of 270, and the specific spinning process is as follows:
a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed by drawing rough yarns made of polyester are output from the front roller, the yarns firstly incline downwards by 30 degrees and bypass the lower part of the first circular belt to form a spinning section I, then bypass the upper part of the second circular belt to form a spinning section II, and the yarns are wound after passing through the yarn guide hook to obtain polyester yarns;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively; the polyester yarn is twisted S, the first circular belt horizontally moves right, and the second circular belt horizontally moves left;
the twist factor of the roving is 105, and the ration is 4g/10m; the yarn strand contacts with the first round belt to form a surrounding angle theta 1 At 60 degrees, the yarn strand contacts with the second round belt to form a surrounding angle theta 2 75 °; the center distance between the first round belt and the front roller is 44mm, the center distance between the second round belt and the front roller is 60mm, the center distance between the first round belt and the second round belt is 16mm, the speeds of the first round belt and the second round belt are independently controlled, the linear speed ratio of the first round belt to the front roller is 1, the linear speed ratio of the second round belt to the front roller is 0.7, and the linear speed ratio of the first round belt to the second round belt is 1.43;
preparing a comparison sample 9, wherein the preparation method of the comparison sample 9 is basically the same as that of the polyester yarns, and is only different in that yarn strands formed by drawing the roving made of polyester are directly fed into a yarn guide hook for winding after being output from a front roller; the average diameter of the prepared comparative sample 9 was 172. Mu.m;
the actual measured count of the prepared yarn is 32S, and the actual measured twist coefficient is 295; the average diameter of the polyester yarn is 181 mu m, which is increased by 5% compared with the comparative sample 9; the radius of the axial spiral track of the fiber in the polyester yarn is 3% of the diameter of the yarn, and the radial packing density centering range of the fiber in the polyester yarn is 45% of the radius of the yarn; the relative bending rigidity of the polyester yarn is 5.7 multiplied by 10 -4 gf·cm·tex -1 The breaking strength was 27cN/tex.
As shown in fig. 7, the degree of inclination of the surface fiber of the polyester yarn is greater than that of the reference sample, i.e., the actual twist factor of the polyester yarn is increased under the same design twist, which makes the cloth cover texture made of the polyester yarn clear.
Fig. 8 is a schematic view of the yarn preparation mechanism of the present invention, and it should be understood that, in addition to the tangential friction force applied to the contacted yarn strands by the first circular band and the second circular band in the above embodiments, other manners of applying the tangential friction force to the yarn strands are also within the scope of the present invention.
Claims (9)
1. A spinning method for changing yarn structure, characterized in that: a first circular belt and a second circular belt are sequentially arranged between a front roller of a spinning frame and a yarn guide hook, yarn strands formed by the drafted roving are output from the front roller, a downward inclination angle phi bypasses the lower part of the first circular belt to form a spinning section I, and then bypasses the upper part of the second circular belt to form a spinning section II, and the yarn is obtained by winding after passing through the yarn guide hook;
the first round belt and the second round belt move transversely, and tangential friction force is applied to the contacted yarn strands respectively;
the linear speed ratio of the first circular belt to the second circular belt is 1.5-8.5;
phi is 15-30 degrees, and the yarn whisker strip contacts with the first circular belt to form a surrounding angle theta 1 45-60 degrees, and an enclosing angle theta formed by the contact of the yarn whisker strip and the second circular belt 2 60-75 DEG and theta 1 <θ 2 。
2. A spinning method for changing a yarn structure according to claim 1, wherein when the yarn is Z-twisted, the first round belt is moved horizontally leftwards, and the second round belt is moved horizontally rightwards; when the yarn is S-twisted, the first circular band moves horizontally to the right and the second circular band moves horizontally to the left.
3. A method of spinning a modified yarn structure as in claim 1 wherein the speeds of the first and second circular bands are independently controlled.
4. The spinning method according to claim 1, wherein the yarn whisker material is one or more of natural fiber and artificial fiber.
5. A method of modifying a yarn structure according to claim 1, wherein the roving has a twist multiplier of 102 to 105 and a basis weight of 4 to 10g/10m.
6. The spinning method for changing yarn structure according to claim 1, wherein the center distance between the first round belt and the front roller is 5-44 mm, the center distance between the second round belt and the front roller is 9-60 mm, the center distance between the first round belt and the second round belt is 4-16 mm, the ratio of the first round belt speed to the front roller is 1-21, and the ratio of the second round belt speed to the front roller is 0.7-14.
7. The spinning method for changing yarn structure according to any one of claims 1 to 6, wherein the design twist factor of the yarn is 190 to 270 and the measured twist factor is 191 to 295;
the radius of the axial spiral track of the fiber in the yarn is 3-20% of the diameter of the yarn, and the radial packing density centering range of the fiber in the yarn is 45-55% of the radius of the yarn.
8. The spinning method for changing yarn structure according to claim 7, wherein the yarn is a pure yarn, a blended yarn or a composite yarn, and the design count of the yarn is 6S to 32S.
9. The yarn spinning method as claimed in claim 8, wherein when the yarn is made of cotton, the relative bending stiffness is 1.7X10 -4 ～3.5×10 -4 gf·cm·tex -1 The breaking strength is 12.5-16.5 cN/tex; when the yarn is made of hemp, the relative bending rigidity is 4.5X10 -4 ～9.5×10 -4 gf·cm·tex -1 The breaking strength is 16-26 cN/tex; when the yarn is made of silk, the relative bending rigidity is 2.5 multiplied by 10 -4 ～3.1×10 - 4 gf·cm·tex -1 Breaking strength of18-21 cN/tex; when the yarn is made of viscose, the relative bending rigidity is 2.0×10 -4 ～3.1×10 -4 gf·cm·tex -1 The breaking strength is 12-14 cN/tex; when the yarn is made of wool, the relative bending rigidity is 1.1X10 -4 ～1.5×10 -4 gf·cm·tex -1 The breaking strength is 6-9 cN/tex; when the yarn is made of nylon, the relative bending rigidity is 1.3 multiplied by 10 -4 ～1.5×10 -4 gf·cm·tex -1 The breaking strength is 23-35 cN/tex; when the yarn is made of wool/cotton blend, the relative bending stiffness is 1.1 multiplied by 10 -4 ～3.5×10 -4 gf·cm·tex -1 The breaking strength is 10 to 13cN/tex; when the yarn is made of nylon/cotton blend, the relative bending stiffness is 1.3 multiplied by 10 -4 ～3.5×10 -4 gf·cm·tex -1 The breaking strength is 18 to 25cN/tex; when the yarn is made of terylene, the relative bending rigidity is 5.5 multiplied by 10 -4 ～5.8×10 -4 gf·cm·tex -1 The breaking strength is 25-30 cN/tex.
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| CN202311211057.1A CN117265713A (en) | 2023-09-19 | 2023-09-19 | Spinning method for changing yarn structure |
| ZA2024/00433A ZA202400433B (en) | 2023-09-19 | 2024-01-12 | Spinning method for changing yarn structure |
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| CN202311211057.1A CN117265713A (en) | 2023-09-19 | 2023-09-19 | Spinning method for changing yarn structure |
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