Polyester core-spun yarn and its production method and application

Abstract

The present invention discloses a polyester core-spun yarn and a production method and application thereof, and belongs to the field of textile technology. The present invention proposes a polyester core-spun yarn, which comprises 65-70% polyester filaments and 30-40% super-bright polyester fibers in terms of mass percentage, wherein the super-bright polyester fibers wrap the polyester filaments. The present invention also proposes a production method for the polyester core-spun yarn, which sequentially comprises a carding process, a drawing process, a roving process, a spinning process and a self-winding process; wherein, in the spinning process, the polyester filaments are drafted, and at the front roller of the drafting zone, the polyester filaments passing through the guide wheel are used as core yarns, and are wrapped in the super-bright polyester fibers for twisting. The polyester core-spun yarn has good joint strength and excellent core wrapping.

Description

Technical Field

[0001] The invention relates to the technical field of textiles, and in particular to a polyester core-spun yarn and a production method and application thereof. Background Art

[0002] Polyester fiber is a high-quality synthetic fiber. The sutures made from it are strong. When polyester core-spun yarn is used as sewing thread, its shrinkage rate is very small. After proper shaping, the shrinkage rate is less than 1%, so the sewn seams can always remain flat and beautiful without shrinkage. It has low moisture regain and good high temperature resistance, low temperature resistance, light resistance and water resistance.

[0003] However, due to the high strength of polyester core-spun yarn, it is difficult to untwist the knotter in the self-winding process during the spinning process, and the joint strength is not high. Generally, spray water splicing is used to make the yarn fully wrapped under the action of water during the twisting process to improve the splicing strength. However, the efficiency of using spray water splicing is low, and it is very easy for flying flowers and water stains to flow around the scissors, affecting the sharpness of the scissors, resulting in unqualified splicing quality and significantly reduced joint strength.

[0004] In addition, polyester core-spun yarn has the problem of poor core-spun and easy to dye. Summary of the invention

[0005] The purpose of the present invention is to overcome the above technical deficiencies, provide a polyester core-spun yarn and a production method and application thereof, and solve the technical problem of how to obtain a polyester core-spun yarn with good joint strength and excellent core-spun in the prior art.

[0006] In order to achieve the above technical purpose, the technical solution of the present invention provides a polyester core-spun yarn, in which, according to mass percentage, polyester filaments account for 65-70%, super-bright polyester fibers account for 30-40%, and the super-bright polyester fibers wrap the polyester filaments.

[0007] Furthermore, the count of the polyester core-spun yarn is 28-30.

[0008] Furthermore, the specific strength of the super bright polyester fiber is 5.8-6.0CN / dtex, and the elongation at break is 22-23%; the specification of the polyester filament is 113D-125D / 36F, the breaking strength is 1180-1200cN, and the elongation is 10-12%.

[0009] In addition, the present invention also proposes a method for producing polyester core-spun yarn, which sequentially includes a combing process, a drawing process, a roving process, a spinning process and a self-winding process; wherein, in the spinning process, the polyester filaments are stretched, and at the front roller in the stretching zone, the polyester filaments passing through the guide wheel are used as core yarns, wrapped in super-bright polyester fibers for twisting.

[0010] Furthermore, a pressure vessel is used for pressurization in the winding process, and the winding pressure is 0.7-0.8 MPa.

[0011] Furthermore, in the cleaning and combing process, the polyester fiber is rolled on a cotton-grabbing circular table, and the dry weight of the cotton roll is 330-336 g / m.

[0012] Furthermore, in the drawing process, after two drawing steps, 8 strands are drawn together in one drawing, with a dry weight of 16-16.5g / 5m, a roller gauge of 12mm×20mm, and a bell mouth diameter of 3mm; 8 strands are drawn together in the second drawing step, with a dry weight of 15.5-16g / 5m, a roller gauge of 12mm×20mm, and a bell mouth diameter of 3.2mm.

[0013] Furthermore, in the spinning process, the jaw spacing is 3.5-4 mm, the front roller speed is 170-180 r / min, the spinning twist is 70-75 twists / 10 cm, and the twist direction is S twist.

[0014] Furthermore, the winding process uses a Murata self-winding air twisting jointer, the nozzle combination uses FBS / J1, and the twisting chamber untwisting tube model is N55.

[0015] In addition, the present invention also proposes an application of the polyester core-spun yarn or the polyester core-spun yarn produced by the above production method in making sewing thread.

[0016] Compared with the prior art, the beneficial effects of the present invention include: the present invention proposes a polyester core-spun yarn, which, by mass percentage, comprises 65-70% polyester filaments and 30-40% super-bright polyester fibers, wherein the super-bright polyester fibers wrap the polyester filaments, and the polyester core-spun yarn has good joint strength and excellent core-spun quality.

[0017] The production method of the polyester core-spun yarn proposed by the present invention comprises a carding process, a drawing process, a roving process, a spinning process and a self-winding process in sequence; wherein, in the spinning process, the polyester filaments are drawn, and at the front roller of the drawing zone, the polyester filaments passing through the guide wheel are used as core yarns, wrapped in super-bright polyester fibers for twisting, and the obtained polyester core-spun yarn has high toughness, high strength, good elongation and recovery, extremely strong wear resistance, small heat-resistant shrinkage, can provide excellent sewing effects, and is used in high-end suits and formal clothing. DETAILED DESCRIPTION

[0018] The present specific embodiment provides a polyester core-spun yarn, which comprises 65-70% polyester filaments and 30-40% super-bright polyester fibers, and the super-bright polyester fibers wrap the polyester filaments, according to the mass percentage; the count of the polyester core-spun yarn is 28-30; the super-bright polyester fibers have a specific strength of 5.8-6.0CN / dtex, an elongation at break of 22-23%, a linear density of 1.33dtex, and a length of 38mm; the specifications of the polyester filaments are 113D-125D / 36F, a breaking strength of 1180-1200cN, and an elongation of 10-12%.

[0019] The specific embodiment of the present invention is a method for producing a polyester core-spun yarn, which comprises the following steps in sequence:

[0020] S1. Combing process: Polyester fiber is rolled on the cotton grabbing round table, and the dry weight of the cotton roll is 330-336g / m. In the combing process, the cotton feeding plate and the licker-in roller are reasonably set. The distance between the cotton feeding plate and the licker-in roller is 12 inches, and the distance between the cylinder and the cover plate at 5 points is 10 inches × 9 inches × 8 inches × 8 inches × 9 inches. The dry weight of the combed cotton is 20-21g / 5m;

[0021] S2, drawing process: after two drawing steps, 8 pieces are drawn in one drawing, the dry weight is 16-16.5g / 5m, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3mm; 8 pieces are drawn in two drawing steps, the dry weight is 15.5-16g / 5m, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3.2mm;

[0022] S3, roving process: roving is produced on FA411 roving frame, with twist of 2.8-3.2 twists / 10cm, roller gauge of 12mm×28mm×38mm, rear zone draft of 1.2 times, jaw gauge of 7mm, roving dry weight of 3.5-4g / 10m, spindle speed of 700-750r / min;

[0023] S4, Spinning process: Spinning is produced on the DTM169 spinning machine using core-spun yarn. The polyester roving is drafted. At the front roller in the drafting zone, the polyester filaments that have passed through the guide wheel are used as core yarns and wrapped in polyester staple fibers for twisting. Due to the high strength of the filaments, the steel collar and wire ring are reasonably selected to avoid the wire ring being lifted after the yarn is dropped. The model of the steel collar is PG1-4254, the model of the wire ring used is W321 42#, the roller gauge is 19mm×36mm, the drafting multiple in the rear area is 1.2 times, the jaw gauge is 3.5-4mm, the front roller diameter is 27mm, the front roller speed is 170-180r / min, the yarn twist is 70-75 twists / 10cm, and the twist direction is S twist. The spinning process strengthens the inspection of running single yarns, and installs a device to prevent the running of single yarns. In addition, the empty tubes of the spindles with broken roving and broken filaments are replaced. Strengthen the cleaning cycle and reduce the generation of flying flowers.

[0024] S5, self-winding process; single yarn winding is produced on Murata's automatic winding machine in Japan, using pressure vessels for pressurization, self-winding pressure of 0.7-0.8MPa, using Murata self-winding air twist jointer, using FBS / J1 nozzle combination, twisting chamber untwisting tube model N55, reasonably adjusting the twisting process to improve the joint strength. Cotton knot N: 250%, short thick S: 130% × 1.4cm, long thick L: 35% × 30cm, detail T: -35% × 30cm; to reduce the nine-level harmful yarn defects and reduce the generation of hairiness. Self-winding electric cleaning sets CV yarn control, CV control upper limit 40-45%, cotton knot control number 20-25, produces T20.0tex single yarn, which is polyester core-spun yarn.

[0025] This specific embodiment also proposes an application of the polyester core-spun yarn or the polyester core-spun yarn produced by the above production method in making sewing thread.

[0026] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0027] Example 1

[0028] This embodiment provides a polyester core-spun yarn, which uses super-bright polyester fiber and 125D / 36F polyester filament, with the polyester filament accounting for 70% and the super-bright polyester fiber accounting for 30%. The super-bright polyester fiber has a specific strength of 5.9CN / dtex, an elongation at break of 22.5%, a linear density of 1.33dtex, and a length of 38mm; the polyester filament has a specification of 125D / 36F, a breaking strength of 1191cN, and an elongation of 11.4%, and is produced by the following process steps:

[0029] (1) Cleaning and combing process

[0030] In the cotton cleaning process, polyester fibers are rolled on the cotton grabbing table, and the dry weight of the cotton rolls is 336g / m. In the cotton combing process, the cotton feeding plate and the licker-in roller are set reasonably, and the 5-point gauge between the cylinder and the cover plate is 10×9×8×8×9, and the dry weight of the cotton is 20.5g / 5m.

[0031] (2) Drawing process

[0032] The drawing process is as follows: after two drawing steps, 8 pieces are drawn together in one drawing, the dry weight is 16.2g / 5m, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3mm; 8 pieces are drawn together in the second drawing step, the dry weight is 16g / 5m, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3.2mm.

[0033] (3) Roving process

[0034] The roving is produced on a FA411 roving frame with a twist of 3.1 twists / 10cm, a roller gauge of 12mm×28mm×38mm, a rear zone draft of 1.2 times, a nip gauge of 7mm, a dry weight of 4g / 10m, and a spindle speed of 750r / min.

[0035] (4) Spinning process

[0036] The spinning machine DTM169 uses core-spun yarn to produce the polyester roving. The polyester roving is drafted. At the front roller of the drafting zone, the polyester filaments that have passed through the guide wheel are used as core yarns and wrapped in the polyester staple fibers for twisting. Due to the high strength of the filaments, the steel collar and wire ring are reasonably selected to avoid the wire ring being lifted after the yarn is dropped. The model of the steel collar is PG1-4254, and the model of the wire ring used is W321 42#. The roller gauge is 19mm×36mm, the drafting multiple in the rear area is 1.2 times, the jaw gauge is 4mm, the front roller diameter is 27mm, the front roller speed is 175r / min, the yarn twist is 73 twists / 10cm, and the twist direction is S twist. The spinning process strengthens the inspection of running single yarns, and installs a device to prevent the running of single yarns. In addition, the empty tubes of the broken roving and broken filament spindles are replaced. Strengthen the cleaning cycle to reduce the generation of flying flowers.

[0037] (5) Self-winding process

[0038] The single yarn winding is produced on the automatic winding machine of Murata in Japan, using pressure vessel pressurization, self-winding pressure of 0.7-0.8MPa, using Murata self-winding air twist jointer, using FBS / J1 nozzle combination, twisting chamber untwisting tube model N55, to improve the joint strength. Cotton knot N: 250%, short thick S: 130% × 1.4cm, long thick L: 35% × 30cm, detail T: -35% × 30cm; to reduce the nine-level harmful yarn defects and reduce the generation of hairiness. The self-winding electric cleaning is set to control the CV yarn dryness, the upper limit of CV control is 45%, and the number of cotton knots is 25, producing T20.0tex single yarn, which is polyester core-spun yarn.

[0039] Example 2

[0040] The polyester core-spun yarn proposed in this embodiment has 65% polyester filaments and 35% super-glossy polyester fibers in percentage by mass. The raw material used is 113D / 36F polyester filaments. The polyester filaments have a breaking strength of 1183 cN and an elongation of 10.8%. Other parameters are the same as those in Example 1, and the production process is the same as that in Example 1.

[0041] Example 3

[0042] This embodiment provides a polyester core-spun yarn, which uses super-bright polyester fiber and 125D / 36F polyester filament, with the polyester filament accounting for 70% and the super-bright polyester fiber accounting for 30%. The super-bright polyester fiber has a specific strength of 5.9CN / dtex, an elongation at break of 22.5%, a linear density of 1.33dtex, and a length of 38mm; the polyester filament has a specification of 125D / 36F, a breaking strength of 1191cN, and an elongation of 11.4%, and is produced by the following process steps:

[0043] (1) Cleaning and combing process

[0044] In the cotton cleaning process, polyester fibers are rolled on the cotton grabbing table, and the dry weight of the cotton rolls is 336g / m. In the cotton combing process, the cotton feeding plate and the licker-in roller are set reasonably, and the 5-point gauge between the cylinder and the cover plate is 10×9×8×8×9, and the dry weight of the cotton is 21g / 5m.

[0045] (2) Drawing process

[0046] The drawing process is as follows: after two drawing steps, 8 pieces are drawn together in one drawing, the dry weight is 16g / 5m, the roller spacing is 12mm×20mm, and the bell mouth diameter is 3mm; the second drawing step is 8 pieces, the dry weight is 16g / 5m, the roller spacing is 12mm×20mm, and the bell mouth diameter is 3.2mm.

[0047] (3) Roving process

[0048] The roving is produced on a FA411 roving frame with a twist of 3.1 twists / 10cm, a roller gauge of 12mm×28mm×38mm, a rear zone draft of 1.2 times, a nip gauge of 7mm, a dry weight of 3.5g / 10m, and a spindle speed of 700r / min.

[0049] (4) Spinning process

[0050] The spinning machine DTM169 uses core-spun yarn to produce the polyester roving. The polyester filaments that have passed through the guide wheel are used as core yarns at the front rollers in the drafting zone and are wrapped in the polyester staple fibers for twisting. Due to the high strength of the filaments, the steel collar and wire ring are reasonably selected to avoid lifting the wire ring after the yarn ends. The model of the steel collar is PG1-4254, and the model of the wire ring used is W321 42#. The roller gauge is 19mm×36mm, the drafting multiple in the rear area is 1.2 times, the jaw gauge is 4mm, the front roller diameter is 27mm, the front roller speed is 170r / min, the yarn twist is 75 twists / 10cm, and the twist direction is S twist. The spinning process strengthens the inspection of running single yarns, and installs a device to prevent the running of single yarns. In addition, the empty tubes of the broken roving and broken filament spindles are replaced. Strengthen the cleaning cycle to reduce the generation of flying flowers.

[0051] (5) Self-winding process

[0052] The single yarn winding is produced on the automatic winding machine of Murata in Japan, using pressure vessel pressurization, self-winding pressure of 0.7-0.8MPa, using Murata self-winding air twist jointer, nozzle combination using FBS / J1, twisting chamber untwisting tube model N55, to improve the joint strength. Cotton knot N: 250%, short thick S: 130% × 1.4cm, long thick L: 35% × 30cm, detail T: -35% × 30cm; to reduce the nine-level harmful yarn defects and reduce the generation of hairiness. The self-winding electric cleaning is set to control the CV yarn dryness, the upper limit of CV control is 40%, and the number of cotton knots is 22, producing T20.0tex single yarn, which is polyester core-spun yarn.

[0053] Example 4

[0054] This embodiment provides a polyester core-spun yarn, which uses super-bright polyester fiber and 125D / 36F polyester filament, with the polyester filament accounting for 70% and the super-bright polyester fiber accounting for 30%. The super-bright polyester fiber has a specific strength of 5.9CN / dtex, an elongation at break of 22.5%, a linear density of 1.33dtex, and a length of 38mm; the polyester filament has a specification of 125D / 36F, a breaking strength of 1191cN, and an elongation of 11.4%, and is produced by the following process steps:

[0055] (1) Cleaning and combing process

[0056] In the cotton cleaning process, polyester fibers are rolled on the cotton grabbing table, and the dry weight of the cotton rolls is 336g / m. In the cotton carding process, the cotton carding distance is reasonably set, the distance between the cotton feed plate and the licker-in roller is 12 inches, the distance between the cylinder and the cover plate at 5 points is 10 inches × 9 inches × 8 inches × 8 inches × 9 inches, and the dry weight of the cotton carding is 20g / 5m.

[0057] (2) Drawing process

[0058] The drawing process is as follows: after two drawing steps, 8 pieces are drawn together in one drawing, the dry weight is 16.5g / 5 meters, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3mm; 8 pieces are drawn together in the second drawing step, the dry weight is 16g / 5 meters, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3.2mm.

[0059] (3) Roving process

[0060] The roving is produced on a FA411 roving frame with a twist of 3.1 twists / 10cm, a roller gauge of 12mm×28mm×38mm, a rear zone draft of 1.2 times, a nip gauge of 7mm, a dry weight of 4g / 10m, and a spindle speed of 700r / min.

[0061] (4) Spinning process

[0062] The spinning machine DTM169 uses core-spun yarn to produce the polyester roving. The polyester roving is drafted. At the front roller of the drafting zone, the polyester filaments that have passed through the guide wheel are used as core yarns and wrapped in the polyester staple fibers for twisting. Due to the high strength of the filaments, the steel collar and wire ring are reasonably selected to avoid lifting the wire ring after the yarn is dropped. The model of the steel collar is PG1-4254, and the model of the wire ring used is W321 42#. The roller gauge is 19mm×36mm, the drafting multiple of the rear zone is 1.2 times, the jaw gauge is 4mm, the front roller diameter is 27mm, the front roller speed is 180r / min, the yarn twist is 70 twists / 10cm, and the twist direction is S twist. The spinning process strengthens the inspection of running single yarns, and installs a device to prevent the running of single yarns. In addition, the empty tubes of the broken roving and broken filament spindles are replaced. Strengthen the cleaning cycle to reduce the generation of flying flowers.

[0063] (5) Self-winding process

[0064] The single yarn winding is produced on the automatic winding machine of Murata in Japan, using pressure vessel pressurization, self-winding pressure of 0.7-0.8MPa, using Murata self-winding air twist jointer, nozzle combination using FBS / J1, twisting chamber untwisting tube model N55, to improve the joint strength. Cotton knot N: 250%, short thick S: 130% × 1.4cm, long thick L: 35% × 30cm, detail T: -35% × 30cm; to reduce the nine-level harmful yarn defects and reduce the generation of hairiness. The self-winding electric cleaning is set to control the CV yarn dryness, the upper limit of CV control is 43%, and the number of cotton knots is 20, producing T20.0tex single yarn, which is polyester core-spun yarn.

[0065] Comparative Example 1

[0066] The difference between the polyester core-spun yarn proposed in this comparative example and that in Example 1 is that the specific strength of the super-bright polyester fiber is 6.37 CN / dtex and the elongation at break is 23.8%; and the polyester filament is 113D filament.

[0067] In the production method, the roving weight is 2.6 g / 10 m, and other parameters are the same as those in Example 1.

[0068] Comparative Example 2

[0069] The difference between this comparative example and Example 1 lies in the production method. Specifically, the self-winding process adopts Murata's self-winding air twisting jointer, the nozzle combination uses FB1 / H, the twisting chamber untwisting tube model is N6, the self-winding pressure is 0.6MPa, and other process parameters are the same as Example 1.

[0070] Comparative Example 3

[0071] The difference between this comparative example and Example 1 lies in the production method. Specifically, the self-winding process adopts Murata's self-winding air twisting jointer, the nozzle combination uses FB0 / J2, the twisting chamber untwisting tube model is N8, and other process parameters are the same as Example 1.

[0072] Performance Testing

[0073] The polyester core-spun yarns produced in Examples 1-4 and Comparative Examples 1-3 were tested for relevant properties according to conventional methods or national standards in the textile field, and the test results are shown in Table 1. It should be noted that in the present invention, yarn cross-sections equal to or less than 50% of the average cross-section are thin sections, and yarn cross-sections greater than or equal to 50% of the average cross-section are thick sections.

[0074] Table 1 Performance test results of single yarn produced in Examples 1-4 and Comparative Examples 1-3

[0075]

[0076] From the data in Table 1 above, it can be seen that the polyester core-spun yarns obtained in Examples 1-4 have good yarn evenness index, few single yarn neps, and high strength. Although the polyester fiber strength in Comparative Example 1 is better than that in Example 1, the yarn strength is lower than that in Example 1. Therefore, the method provided by the present invention can obtain a polyester core-spun yarn with better quality.

[0077] Other beneficial effects of the present invention include:

[0078] 1) In the production method provided by the present invention, the self-winding adopts Murata's self-winding air-twisting jointer, uses a pressure vessel for pressurization, and the self-winding pressure is 0.7-0.8MPa. The special parts configuration and splicing process are reasonably selected to improve the joint strength and joint consistency, so as to achieve the effect of using a spray water splicing joint;

[0079] 2) The polyester core-spun yarn obtained by the present invention has high toughness, high strength, good elongation and recovery, extremely strong abrasion resistance, small heat-resistant shrinkage, can provide excellent sewing effect, and is used in high-end suits and formal clothing.

[0080] The specific implementation of the present invention described above does not constitute a limitation on the protection scope of the present invention. Any other corresponding changes and modifications made based on the technical concept of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A polyester core-spun yarn, characterized in that: According to the mass percentage, the polyester filament accounts for 65-70%, the super-bright polyester fiber accounts for 30-40%, the sum of the mass of the polyester filament and the super-bright polyester fiber is 100%, and the super-bright polyester fiber wraps the polyester filament; the count of the polyester core-spun yarn is 28-30; the specific strength of the super-bright polyester fiber is 5.8-6.0cN / dtex, and the elongation at break is 22-23%; the specification of the polyester filament is 113D-125D / 36F, the breaking strength is 1180-1200cN, and the elongation is 10-12%; the polyester core-spun yarn is produced by the following steps: including a carding process, a drawing process, a roving process, a spinning process and a self-winding process in sequence; wherein, in the spinning process, the polyester filament is drafted, and at the front roller of the drafting zone, the polyester filament passing through the guide wheel is used as a core yarn and wrapped in the super-bright polyester fiber for twisting; In the drawing process, after two drawing steps, 8 strands are drawn together in one drawing step, the dry weight is 16-16.5g / 5m, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3mm; 8 strands are drawn together in the second drawing step, the dry weight is 15.5-16g / 5m, the roller gauge is 12mm×20mm, and the bell mouth diameter is 3.2mm; In the spinning process, the jaw spacing is 3.5-4 mm, the front roller speed is 170-180 r / min, the spinning twist is 70-75 twists / 10 cm, and the twist direction is S twist; The self-winding process uses a Murata self-winding air twisting jointer, the nozzle combination uses FBS / J1, and the twisting chamber untwisting tube model is N55.

2. The polyester core-spun yarn according to claim 1, characterized in that: The self-winding process uses a pressure vessel for pressurization, and the self-winding pressure is 0.7-0.8MPa.

3. The polyester core-spun yarn according to claim 1, characterized in that: In the cleaning and combing process, the polyester fiber is rolled on a cotton grabbing round table, and the dry weight of the cotton roll is 330-336g / m.

4. Use of the polyester core-spun yarn according to any one of claims 1 to 3 in making sewing thread.

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