CN114561732B - A kind of preparation method of non-spandex single-hole filament core-spun yarn - Google Patents

Abstract

The invention relates to a method for preparing a non-spandex single-hole filament core-spun yarn. The pretreated non-spandex single-hole filament (with an oil content of 0.3 to 0.5%) is unwound from a horizontally placed silk tube and then sequentially passed through the second One wire guide rod, tension adjustment rod, wire guide hook, second wire guide rod, third wire guide rod, rear wire guide wheel, front wire guide wheel, double roving is fed into the rear roller, middle roller and front roller through the bell mouth , and merge with the non-spandex single-hole filament output from the front guide wheel at the nip of the front roller, and perform mechanical twisting after passing through the yarn guide hook to obtain a non-spandex single-hole filament core-spun yarn; the surface static friction of the tension adjustment rod The coefficient is 1.2 to 2 times that of the first guide screw, and the tension value of the single-hole filament can be increased by 1.5 to 3 times after the tension adjustment rod. The method of the present invention effectively solves the problems of yarn hollow core, eccentric core, exposed core and poor yarn quality caused by the free unwinding of the filament, relaxation of tension, and difficulty in positioning control caused by the smooth friction of the single-hole filament surface. The yarn covering effect and yarn quality are significantly improved.

Description

A kind of preparation method of non-spandex single-hole filament core-spun yarn

technical field

The invention belongs to the technical field of spinning and relates to a preparation method of a non-spandex single-hole filament core-spun yarn.

Background technique

Core-spun yarn is a composite structure yarn composed of outer fiber and core yarn. Usually the core layer is filament, and the outer layer is covered with short fiber. It has the characteristics of both short fiber and filament. It is widely used in various clothing and clothing. In decorative textiles. According to the elastic characteristics of core yarn and core-spun yarn, core-spun yarn can be divided into elastic core-spun yarn with spandex as the core and non-elastic core-spun yarn with polyester, polyamide and other synthetic filaments as the core. Spandex core-spun yarn is soft and has good resilience, which can meet the needs of close-fitting wear and elastic comfort, and is widely used in underwear, sportswear, jeans and other products. The core-spun yarn with polyamide, polyester and other synthetic filaments as the core can endow the fabric with strength, wrinkle resistance, wear resistance, and good shape retention on the basis of having the outer short fiber comfortable and skin-friendly. The core-spun yarn has a unique style, crisp fabric, and easy care. It has good application prospects in the fields of formal coats, shirts, casual wear, and bedding.

However, when non-spandex single-hole filaments are used as core yarns to prepare core-spun yarns, due to the smooth surface of the single-hole filaments, the friction force generated during the movement is small, and there are free unwinding and tension sluggish phenomena of the filaments, resulting in broken filaments. , Inaccurate positioning of the core filament, etc., resulting in hollow core, eccentric core, exposed core and other yarn defects, which seriously affect the quality of the yarn and the quality of the subsequent cloth surface. Therefore, how to effectively improve the tension and stability of the core yarn is particularly important for the preparation and quality control of the non-spandex single-hole filament core-spun yarn.

At present, in the preparation of core-spun yarn, the following methods are mainly used to control the filament tension: (1) The filament passes through a set of fixed guide wire rods, and is adjusted by changing the position of the guide rod and the enveloping angle between the filament and the guide rod. Filament tension; (2) The filament passes through the disc tension device, and the filament pressure is changed by changing the weight of the tension ring, thereby adjusting the filament tension. In this method, the tension disc usually fluctuates greatly due to the yarn passing through, and the tension output by the silk sliver fluctuates greatly; (3) by installing an additional transmission device and a transmission roller, and by controlling the linear speed ratio between the transmission roller and the front roller, Active filament feeding and tension control are realized. This method requires modification of spinning equipment and high cost. It is mostly used in the processing of spandex filament core-spun yarn that requires a certain pre-drawing multiple. Among the above three methods, the method (1) is the most widely used in non-spandex core-spun yarns and has low cost, but for non-spandex single-hole filament core-spun yarns, the conventional method of changing the position of the guide wire The method of wrapping the angle between the bar and the guide wire rod cannot achieve a good tension control effect.

Contents of the invention

The purpose of the present invention is to solve the problem of free unwinding of filaments, loose tension, difficulty in positioning and control of core filaments, broken filaments, Silk and other problems, improve the quality and processing efficiency of such core-spun yarn.

In order to achieve the above object, the technical scheme adopted in the present invention is as follows:

A method for preparing non-spandex single-hole filament core-spun yarn. The single-hole filament is pretreated with degreasing agent and humidity control, and the pretreated non-spandex single-hole filament is unwound from a horizontally placed silk tube Then through the first wire guide rod, tension adjustment rod, wire guide hook, second wire guide rod, third wire guide rod, rear wire guide wheel, front wire guide wheel, double roving is fed into the rear roller, middle roller through the bell mouth The roller, the front roller, and the non-spandex single-hole filament output from the front guide wheel are merged at the nip of the front roller, and the non-spandex single-hole filament core-spun yarn is obtained by mechanical twisting after passing through the yarn guide hook;

The tension adjustment rod and the first guide wire rod are made of materials with different friction coefficients, and the surface static friction coefficient between the tension adjustment rod and the non-spandex single-hole filament is 1.2-2 of the surface static friction coefficient between the first guide wire rod and the non-spandex single-hole filament times; the tension value of the single-hole filament is increased by 1.5 to 3 times after passing through the tension adjusting rod. When the surface static friction coefficient between the tension adjusting rod and the non-spandex single-hole filament is lower than 1.2 times of the surface static friction coefficient between the first guide rod and the non-spandex single-hole filament, it is impossible to solve the problem that the single-hole filament is unwound due to the free thread sliver And the tension slack problem that produces; When the surface static friction coefficient of the tension adjusting rod and the non-spandex single-hole long filament is higher than 2 times of the surface static friction coefficient of the first guide wire rod and the non-spandex single-hole long filament, it will be due to the long Excessive yarn tension leads to a decline in yarn strength and other properties;

The oil content of the non-spandex single-hole filament after pretreatment is 0.3-0.5%, and compared with that before pretreatment, the oil content reduction rate is not less than 20%.

As a preferred technical solution:

The above-mentioned preparation method of a non-spandex single-hole filament core-spun yarn, the process of pretreatment of the non-spandex single-hole filament is as follows: the non-spandex single-hole filament drum is first vacuumed at a degree of vacuum of -0.08 to -0.05 MPa, drying in the air medium with a temperature of 30-50°C for 12 hours, and then treating it in saturated water vapor at 50-80°C for 10-20 minutes (too high temperature will cause deformation and structural changes of filaments; too low temperature will cause The vacuum degree is high and the cost is increased; the time setting is 10-20 minutes to ensure that the low-temperature saturated water vapor can penetrate into the yarn evenly) and then take it out and equilibrate it at room temperature for 24 hours.

Through the above pretreatment, the oil content of the single-hole filament is reduced and the humidity of the single-hole filament is adjusted. The reduction of the oil content on the surface of the filament can increase the friction between the fibers and improve the retreat of the single-hole filament from the bobbin. The free unwinding phenomenon during winding, and the humidity-conditioning treatment is beneficial to improve the frictional static phenomenon and create conditions for subsequent core-spun yarn processing.

A method for preparing non-spandex single-hole filament core-spun yarn as described above, the non-spandex single-hole filament is single-hole nylon filament, single-hole polyester filament or single-hole polypropylene filament, except these three kinds of single-hole filaments Outside filament, other non-elastic single-hole chemical fiber filaments are equally applicable to the present invention; Double rovings are cotton, viscose, modal, lyocell, polyester staple fiber, nylon staple fiber or acrylic fiber staple fiber, and are equally applicable to this invention. Types of inventive double rovings include, but are not limited to, those listed.

In the above-mentioned method for preparing non-spandex single-hole filament core-spun yarn, the first wire guide rod, the second wire guide rod, and the third wire guide rod are all made of stainless steel.

A kind of preparation method of non-spandex single-hole filament core-spun yarn as mentioned above, the diameter of the tension adjustment rod is 30-80mm; the distance between the tension adjustment rod and the first guide wire rod can be adjusted in both horizontal and vertical directions, The vertical projection distance between the tension adjusting rod and the first guide screw rod is 10-40cm, and the horizontal projection distance is 0-20mm.

According to the above-mentioned method for preparing non-spandex single-hole filament core-spun yarn, the tension value of the non-spandex single-hole filament is increased by 1.5 to 3 times after the non-spandex single-hole filament passes through the tension adjusting rod.

A kind of preparation method of non-spandex single-hole filament core-spun yarn as mentioned above, the distance between the rear godet wheel and the front godet wheel along the advancing direction of the thread (i.e. between the back godet wheel mandrel and the front godet mandrel mandrel). The distance) is 5-20cm to keep the stability and good positioning of the filament movement.

According to the above-mentioned preparation method of non-spandex single-hole filament core-spun yarn, the distance between the bell mouths is 2-10 mm.

According to the above-mentioned method for preparing a non-spandex single-hole filament core-spun yarn, the count of the non-spandex single-hole filament core-spun yarn is more than 32S.

The non-spandex single-hole filament core-spun yarn has low weight deviation rate and evenness CV, and excellent breaking strength; hollow core yarn defects are 0/3000m, open core yarn defects are 0/3000m; no breakage occurs during spinning The wire and core wire run out of the godet wheel, and the back cloth surface is smooth and colorless.

Principle of the present invention is as follows:

A method for preparing non-spandex single-hole filament core-spun yarn of the present invention, the surface oil content of non-spandex single-hole filament is reduced after pretreatment, the friction between fibers is increased, and the single-hole filament is improved. The free unwinding phenomenon when unwinding from the bobbin creates conditions for subsequent core-spun yarn processing.

The pretreated single-hole filament is unwound from the horizontally placed wire tube. During the unwinding process, a tension adjustment rod is installed behind the first wire guide rod. The tension adjustment rod adopts a friction coefficient different from that of the first wire guide rod. The material with different friction coefficient makes the filament form a differential friction between the first guide rod and the tension adjustment rod, effectively improves the filament tension, and eliminates the filament tension caused by the smooth surface of the single-hole filament and free unwinding relaxation phenomenon.

After passing through the tension adjusting rod, the thread continues to pass through the wire guide hook, the second guide wire rod, and the third wire guide rod, and a rear guide wire wheel is added between the third guide wire rod and the front wire guide wheel to improve the movement stability of the wire sliver and positioning effects. Specifically, single-hole filaments have thick fibers, high mass per unit length, and high fiber motion inertia. Before the filaments enter the nip of the front roller, it is difficult to stably control the movement and position of the filaments only by the front guide wheel. By setting the rear godet wheel and adjusting the position of the rear godet wheel, the movement stability of the yarn can be improved and the deviation of the yarn position can be reduced.

The present invention effectively solves the problems of free unwinding, tension relaxation, difficulty in core filament positioning control, and broken filaments during the preparation process of non-spandex single-hole filament core-spun yarn through the above technical scheme, and the yarn quality and cloth surface effect are significantly improved.

Beneficial effect:

(1) a kind of preparation method of non-spandex single-hole filament core-spun yarn of the present invention, reduce the content of long-filament oil agent through pre-treatment of single-hole long-filament, make the decline rate of long-filament oil agent content not less than 20%, To create favorable conditions for improving the free unwinding of single-hole filaments; by adding a tension adjustment rod with a different friction coefficient from the first guide wire rod, the yarn tension value can be increased by 1.5 to 3 times. Differential friction is formed between the adjusting rods, which effectively eliminates the phenomenon of broken wire and tension relaxation caused by the smooth surface of the single-hole filament and free unwinding; through the synergistic effect of the rear guide wheel and the front guide wheel, the filament Tension fluctuation, improve filament positioning effect. Through the above measures, the problems of hollow core, eccentricity and exposed core of non-spandex single-hole filament core-spun yarn are solved, and the obtained single-hole filament core-spun yarn has high yarn quality and good cloth surface effect;

(2) The preparation method of a non-spandex single-hole filament core-spun yarn of the present invention is simple, easy to implement, low in cost, improves the yarn processing efficiency, and has good economic benefits.

Description of drawings

Fig. 1 is a schematic diagram of the processing of the non-spandex single-hole filament core-spun yarn of the present invention.

Among them, 1-single-hole nylon 6 filament, 2-filament tube, 3-first guide wire rod, 4-tension adjustment rod, 5- guide wire hook, 6-second guide wire rod, 7-third guide wire Rod, 8-rear guide roller, 9-front guide roller, 10-double roving, 11-bell mouth, 12-rear roller, 13-middle roller, 14-front roller, 15-yarn guide hook, 16-single hole Nylon 6 filament core-spun yarn.

Detailed ways

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

Example 1

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 20D/1F single-hole nylon 6 filaments so that their oil content is 0.4%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) As shown in Figure 1, the pretreated single-hole nylon 6 filament 1 is unwound from the horizontally placed silk tube 2 and then passes through the first guide wire rod 3, the tension adjustment rod 4, the guide wire hook 5, The second wire guide rod 6, the third wire guide rod 7, the rear wire guide wheel 8, the front wire guide wheel 9, the viscose double roving 10 is fed into the rear roller 12, the middle roller 13, the front roller 14 through the bell mouth 11, and Converge at the nip of the front roller with the single-hole nylon 6 filament output from the front guide wheel 9, and mechanically twist after passing through the yarn guide hook 15 to obtain a 60S single-hole nylon 6 filament core-spun yarn 16; wherein, viscose The dry weight of the double roving is 3.19g/10m, the total draft ratio of the spun yarn is 96.28, and the twist coefficient is 400.6; the first, second and third guide wires are made of stainless steel, and the first guide wire The surface static friction coefficient with the single-hole nylon 6 filament is 0.22; the diameter of the tension adjustment rod is 40mm, and the material is PVC, and the surface static friction coefficient with the single-hole nylon 6 filament is 0.37; The vertical projection distance between them is 350mm, and the horizontal projection distance is 10mm; the tension value of the single-hole nylon 6 filament is increased by 2.1 times after passing through the tension adjustment rod; the distance between the rear guide wheel and the front guide wheel along the advance direction of the thread is 10cm ; The distance between the bell mouths is 3mm.

The weight deviation rate of the obtained single-hole nylon 6 filament core-spun yarn is 0.8%, the evenness CV is 11.24%, and the breaking strength is 15.4cN/tex; the hollow core yarn defect is 0/3000m, and the exposed core yarn defect is 0 pieces/3000m; during the spinning process, there is no phenomenon of broken yarn and core yarn running out of the godet wheel, and the cloth surface of the back road is smooth and colorless.

Comparative example 1

A preparation method of a single-hole nylon 6 filament core-spun yarn, which is basically the same as in Example 1, except that the pretreatment process of step (1) single-hole nylon 6 filament is omitted, and the finally obtained single-hole nylon 6 The weight deviation rate of filament core-spun yarn is 2.0%, the evenness CV is 13.2%, and the breaking strength is 13.6cN/tex; the hollow core yarn defect is 6/3000m, and the open core yarn defect is 2/3000m; Wire breakage occurs during the process.

Comparing Example 1 with Comparative Example 1, it can be seen that the yarn weight deviation rate and evenness CV value of the core-spun yarn without pretreatment of the core yarn increases, and the yarn strength decreases; hollow core yarn defects appear and exposed core yarn defects, and multiple broken filaments in the spinning process, this is because the unpretreated filament oil content is high, the friction between the fibers is small during unwinding, and the filaments on the bobbin It is easy to unwind freely and the core filaments are entangled with each other, resulting in a decrease in yarn quality and broken filaments during spinning.

Comparative example 2

A preparation method of single-hole nylon 6 filament core-spun yarn, basically the same as embodiment 1, the difference is only that the surface static friction coefficient of the tension adjustment rod and single-hole nylon 6 filament and the first guide wire in step (2) The surface static friction coefficients of the rod and the single-hole nylon 6 filament are equal to 0.22, and the weight deviation rate of the finally prepared single-hole nylon 6 filament core-spun yarn is 1.8%, the evenness CV is 13.8%, and the breaking strength is 13.2%. cN/tex; hollow core yarn defects are 2/3000m, and open core yarn defects are 9/3000m; fabric surface unevenness and colored flowers appear in the back line.

Comparing Example 1 with Comparative Example 2, it can be seen that when the surface friction coefficient of the tension adjustment rod and the first guide wire rod are the same, the yarn weight deviation rate and evenness CV value of the core-spun yarn increase, and the yarn strength decrease; hollow core yarn defects and exposed core yarn defects appear, and the effect of the back cloth surface decreases. This is because when the stainless steel tension adjustment rod with a small surface friction coefficient is used, the tension of the filament before feeding the nip of the front roller is too small. Less sliver control results in lower yarn quality and corespun effect.

Comparative example 3

A preparation method of single-hole nylon 6 filament core-spun yarn, basically the same as embodiment 1, the difference is only that the surface static friction coefficient of the tension regulating rod and single-hole nylon 6 filament in step (2) is the first guide wire 2.5 times the surface static friction coefficient of the rod and the single-hole nylon 6 filament is 0.55, and the weight deviation rate of the finally prepared single-hole nylon 6 filament core-spun yarn is 1.2%, the evenness CV is 12.5%, and the breaking strength is 12.1% cN/tex; hollow core yarn defect is 0/3000m, open core yarn defect is 2/3000m.

Comparing Example 1 with Comparative Example 3, it can be seen that when the difference between the surface friction coefficient of the tension adjustment rod and the first guide wire rod exceeds 2 times, the yarn weight deviation rate and evenness CV value of the core-spun yarn increase. Large, the yarn strength has dropped significantly, and core-spun yarn defects have appeared. This is because the thread tension is relatively high at this time, and the loss of thread strength increases during processing, resulting in a large drop in core-spun yarn strength.

Comparative example 4

A preparation method of single-hole nylon 6 filament core-spun yarn, basically the same as embodiment 1, the difference is only that the single-hole nylon 6 filament pretreated in step (2) only passes through after the third guide wire rod The leading wire roller, and then the output is merged with the viscose double roving. The weight deviation rate of the finally produced single-hole nylon 6 filament core-spun yarn is 1.0%, the evenness CV is 12.1%, and the breaking strength is 14.2cN/tex. There are 0 yarn defects/3000m, and 3 open core yarn defects/3000m. During the spinning process, filaments run out from the front godet wheel.

Comparing Example 1 with Comparative Example 4, it can be seen that when the single-hole nylon 6 filament only passes through the front guide wheel after the third guide rod, the quality of the yarn is reduced, and core yarn defects appear, which means It is caused by insufficient control of the movement direction and position of the single-hole filament by the front guide wheel alone.

Example 2

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 20D/1F single-hole nylon 6 filaments so that their oil content is 0.4%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) After the pretreated single-hole nylon 6 filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, and the third wire guide rod in turn. , rear guide wheel, front guide wheel, bamboo viscose double roving is fed into the rear roller, middle roller and front roller through the bell mouth, and is connected with the single-hole nylon 6 filament output from the front guide wheel at the nip of the front roller 50S single-hole nylon 6 filament core-spun yarn is obtained by mechanical twisting after passing through the yarn guide hook; wherein, the dry basis weight of the double roving fed into the yarn is 3.63g/10m, the total draft ratio of the spun yarn is 86.8, and the twist coefficient is 399 ; The first guide screw, the second guide screw and the third guide screw are all made of stainless steel, and the surface static friction coefficient between the first guide screw and the single-hole nylon 6 filament is 0.22; the diameter of the tension adjustment rod is 40mm, The material is PVC, and the surface static friction coefficient with the single-hole nylon 6 filament is 0.37; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole nylon 6 filament warp tension After adjusting the rod, the thread tension value is increased by 2.2 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the thread is 10cm; the distance between the bell mouth is 3mm.

The weight deviation rate of the prepared single-hole nylon 6 filament core-spun yarn is 1.5%, the evenness CV is 11.41%, the breaking strength is 15.7cN/tex, the hollow yarn defect is 0/3000m, and the exposed core yarn defect is 0/ 3000m.

Example 3

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 20D/1F single-hole nylon 6 filaments so that their oil content is 0.4%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) After the pretreated single-hole nylon 6 filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, and the third wire guide rod in turn. , rear guide roller, front guide roller, viscose double roving is fed into the rear roller, middle roller and front roller through the bell mouth, and merges with the single-hole nylon 6 filament output from the front roller at the nip of the front roller , through mechanical twisting after the yarn guide hook to obtain 40S single-hole nylon 6 filament core-spun yarn; wherein, the dry basis weight of the double roving is 3.63g/10m, the total draft ratio of the spun yarn is 66.14, and the twist coefficient is 384; the first The guide wire rod, the second guide wire rod and the third guide wire rod are all made of stainless steel, and the surface static friction coefficient between the first wire guide rod and the single-hole nylon 6 filament is 0.22; the diameter of the tension adjustment rod is 40mm, and the material is PVC , the surface static friction coefficient with the single-hole nylon 6 filament is 0.37; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole nylon 6 filament passes through the tension adjustment rod The thread tension value is increased by 1.8 times; the distance between the rear godet wheel and the front godet wheel along the advancing direction of the thread is 10cm; the distance between the bell mouths is 3mm.

The weight deviation rate of the prepared single-hole nylon 6 filament core-spun yarn is 1.4%, the evenness CV is 10.01%, the breaking strength is 18.2cN/tex, the hollow core yarn defect is 0/3000m, and the exposed core yarn defect is 0/ 3000m.

Example 4

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 30D/1F single-hole nylon 6 filament to make its oil content 0.36%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) After the pretreated single-hole nylon 6 filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, and the third wire guide rod in turn. , rear guide roller, front guide roller, viscose double roving is fed into the rear roller, middle roller and front roller through the bell mouth, and merges with the single-hole nylon 6 filament output from the front roller at the nip of the front roller 32S single-hole nylon 6 filament core-spun yarn is obtained by mechanical twisting after the yarn guide hook; wherein, the dry basis weight of the double roving fed into the yarn is 3.63g/10m, the total draft ratio of the spun yarn is 63.5, and the twist coefficient is 395; The first wire guide, the second guide wire and the third wire guide are all made of stainless steel, and the surface static friction coefficient between the first wire guide and the single-hole nylon 6 filament is 0.22; the diameter of the tension adjustment rod is 40mm, and the material It is PVC, and the surface static friction coefficient with the single-hole nylon 6 filament is 0.37; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole nylon 6 filament is adjusted by tension The thread tension value after the rod is increased by 2.5 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the thread is 10cm; the distance between the bell mouth is 3mm.

The weight deviation rate of single-hole nylon 6 filament core-spun yarn is 2.4%, the evenness CV is 8.81%, the breaking strength is 19.3cN/tex, the hollow core yarn has 0 defects/3000m, and the open core yarn has 0 defects/3000m.

Example 5

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 20D/1F single-hole nylon 6 filaments so that their oil content is 0.4%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) After the pretreated single-hole nylon 6 filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, and the third wire guide rod in turn. , rear godet, front godet, viscose 50/combed cotton 50 double rovings are fed into the rear roller, middle roller and front roller through the bell mouth, and are connected with the single output from the front godet at the nip of the front roller 50S single-hole nylon 6 filament core-spun yarn is obtained by mechanically twisting through the yarn guide hook after the fusion of nylon 6 filaments with holes; among them, the dry basis weight of the double roving fed is 3.63g/10m, and the total draft ratio of the spun yarn is 86.8 , the twist coefficient is 399; the first guide screw, the second guide screw and the third guide screw are all made of stainless steel, and the surface static friction coefficient between the first guide screw and single-hole nylon 6 filament is 0.22; the tension adjustment rod The diameter is 40mm, the material is PVC, and the surface static friction coefficient with the single-hole nylon 6 filament is 0.37; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole nylon 6 After the filament passes through the tension adjusting rod, the thread tension value is increased by 2 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the thread is 10cm; the distance between the bell mouth is 3mm.

The weight deviation rate of the prepared single-hole nylon 6 filament core-spun yarn is 0.8%, the evenness CV is 10.65%, the breaking strength is 16.1cN/tex, the hollow yarn defect is 0/3000m, and the exposed core yarn defect is 0/ 3000m.

Example 6

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 15D/1F single-hole nylon 6 filaments so that their oil content is 0.4%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) After the pretreated single-hole nylon 6 filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, and the third wire guide rod in turn. , rear godet, front godet, viscose 50/combed cotton 50 double rovings are fed into the rear roller, middle roller and front roller through the bell mouth, and are connected with the single output from the front godet at the nip of the front roller Hole nylon 6 filaments converge, and mechanical twisting is carried out after the guide hook to obtain 50S single-hole nylon 6 filament core-spun yarn; wherein, the dry basis weight of the double roving is 3.63g/10m, and the total draft ratio of the spun yarn is 81.69. The twist coefficient is 396; the first guide screw, the second guide screw and the third guide screw are all made of stainless steel, and the surface static friction coefficient between the first guide screw and single-hole nylon 6 filament is 0.22; the tension adjustment rod The diameter is 40mm, the material is PVC, and the surface static friction coefficient with the single-hole nylon 6 filament is 0.37; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole nylon 6 After the filament passes through the tension adjusting rod, the thread tension value is increased by 2.2 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the thread is 10cm; the distance between the bell mouth is 3mm.

The weight deviation rate of the prepared single-hole nylon 6 filament core-spun yarn is 1.2%, the evenness CV is 12.5%, the breaking strength is 13.1cN/tex, the hollow yarn defect is 0/3000m, and the exposed core yarn defect is 0/ 3000m.

Example 7

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 10D/1F single-hole nylon 6 filament to make its oil content 0.42%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) After the pretreated single-hole nylon 6 filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, and the third wire guide rod in turn. , rear godet, front godet, viscose 50/combed cotton 50 double rovings are fed into the rear roller, middle roller and front roller through the bell mouth, and are connected with the single output from the front godet at the nip of the front roller 50S single-hole nylon 6 filament core-spun yarn is obtained by mechanically twisting through the yarn guide hook; among them, the dry basis weight of the double roving fed is 3.63g/10m, and the total draft ratio of the spun yarn is 77.15 , the twist coefficient is 385; the first guide screw, the second guide screw and the third guide screw are all made of stainless steel, and the surface static friction coefficient between the first guide screw and single-hole nylon 6 filament is 0.22; the tension adjustment rod The diameter is 30mm, the material is PVC, and the surface static friction coefficient with the single-hole nylon 6 filament is 0.37; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 310mm, and the horizontal projection distance is 10mm; the single-hole nylon 6 After the filament passes through the tension adjusting rod, the thread tension value is increased by 1.8 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the thread is 10cm; the distance between the bell mouth is 3mm.

The weight deviation rate of the prepared single-hole nylon 6 filament core-spun yarn is 1.0%, the evenness CV is 12.58%, the breaking strength is 14.6cN/tex, the hollow yarn defect is 0/3000m, and the exposed core yarn defect is 0/ 3000m.

Example 8

A preparation method of single-hole nylon 6 filament core-spun yarn, the steps are as follows:

(1) Pretreat the 30D/1F single-hole nylon 6 filament to make its oil content 0.35%. Dry in air at ℃ for 12 hours, and then treat in saturated water vapor at 60℃ for 10 minutes; spin in the workshop room temperature (25℃) after 24 hours of environmental balance;

(2) After the pretreated single-hole nylon 6 filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, and the third wire guide rod in turn. , rear guide roller, front guide roller, viscose 50/polyester 50 double roving is fed into the rear roller, middle roller and front roller through the bell mouth, and is connected with the single-hole nylon output from the front roller at the nip of the front roller. The 6 filaments are merged, and mechanically twisted after passing through the yarn guide hook to obtain a 34S single-hole nylon 6 filament core-spun yarn; wherein, the dry weight of the double roving fed is 3.63g/10m, the total draft of the spun yarn is 59, and the twist The coefficient is 393; the first guide screw, the second guide screw and the third guide screw are all made of stainless steel, and the surface static friction coefficient between the first guide screw and the single-hole nylon 6 filament is 0.22; the diameter of the tension adjustment rod 40mm, the material is PVC, and the surface static friction coefficient of the single-hole nylon 6 filament is 0.37; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole nylon 6 long After the yarn passes through the tension adjusting rod, the yarn tension value is increased by 2.5 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the yarn is 10cm; the distance between the bell mouth is 3mm.

The weight deviation rate of the prepared single-hole nylon 6 filament core-spun yarn is 1.6%, the evenness CV is 10.01%, the breaking strength is 24.9cN/tex, the hollow yarn defect is 0/3000m, and the exposed core yarn defect is 0 /3000m.

Example 9

A preparation method of single-hole polyester filament core-spun yarn, the steps are as follows:

(1) Pretreat the 30D/1F single-hole polyester filaments so that their oil content is 0.32%. Dry in the air for 12 hours, and then process in saturated water vapor at 80°C for 10 minutes; balance in the workshop room temperature (25°C) for 24 hours before spinning;

(2) After the pretreated single-hole polyester filament is unwound from the horizontally placed silk tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, the third wire guide rod, Rear godet roller, front godet roller, viscose 50/combed cotton 50 double rovings are fed into the rear roller, middle roller and front roller through the bell mouth, and are connected with the single hole output from the front godet roller at the nip of the front roller 32S single-hole polyester filament core-spun yarn is obtained by mechanically twisting the polyester filaments after passing through the yarn guide hook; among them, the dry basis weight of the double roving is 3.63g/10m, the total draft ratio of the spun yarn is 63.5, and the twist coefficient is 395; the first guide wire rod, the second guide wire rod and the third guide wire rod are all made of stainless steel, and the surface static friction coefficient between the first guide wire rod and the single-hole polyester filament is 0.22; the diameter of the tension adjustment rod is 40mm, The material is PVC, and the surface static friction coefficient with the single-hole polyester filament is 0.39; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole polyester filament passes through the tension adjustment rod The tension value of the rear thread is increased by 2.6 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the thread is 12cm; the distance between the bell mouth is 3mm.

The weight deviation rate of the obtained single-hole polyester filament core-spun yarn is 0.2%, the evenness CV is 10.23%, the breaking strength is 15.3cN/tex, the hollow core yarn defect is 0/3000m, and the exposed core yarn defect is 0/ 3000m.

Example 10

A preparation method of single-hole polypropylene filament core-spun yarn, the steps are as follows:

(1) Pretreat the 15D/1F single-hole polypropylene filament to make its oil content 0.33%. The pretreatment process is: first place the single-hole polypropylene filament in a vacuum with a degree of -0.06MPa and a temperature of 35°C. Dry in the air for 12 hours, and then treat in saturated water vapor at a temperature of 50°C for 10 minutes; perform spinning after 24 hours of environmental balance at room temperature (25°C);

(2) After the pretreated single-hole polypropylene filament is unwound from the horizontally placed wire tube, it passes through the first wire guide rod, the tension adjustment rod, the wire guide hook, the second wire guide rod, the third wire guide rod, Rear godet roller, front godet roller, viscose 50/combed cotton 50 double rovings are fed into the rear roller, middle roller and front roller through the bell mouth, and are connected with the single hole output from the front godet roller at the nip of the front roller 32S single-hole polypropylene filament core-spun yarn is produced by mechanical twisting after passing through the yarn guide hook; among them, the dry basis weight of the double roving fed is 3.63g/10m, the total draft ratio of the spun yarn is 62.2, and the twist coefficient It is 391, the first guide wire rod, the second guide wire rod and the third guide wire rod are all made of stainless steel, the surface static friction coefficient between the first guide wire rod and single-hole polypropylene filament is 0.24; the diameter of the tension adjustment rod is 40mm , the material is PVC, and the surface static friction coefficient of the single-hole polypropylene filament is 0.38; the vertical projection distance between the tension adjustment rod and the first guide wire rod is 350mm, and the horizontal projection distance is 10mm; the single-hole polypropylene filament is adjusted by tension The thread tension value behind the rod is increased by 2.1 times; the distance between the rear guide wheel and the front guide wheel along the advancing direction of the thread is 12cm; the distance between the bell mouth is 5mm.

The weight deviation rate of the obtained single-hole polypropylene filament core-spun yarn is 0.8%, the evenness CV is 11.4%, the breaking strength is 19.8cN/tex, the hollow core yarn defect is 0/3000m, and the exposed core yarn defect is 0/ 3000m.

Claims (7)

1. A preparation method of non-spandex single-hole filament core-spun yarn, characterized in that: the non-spandex single-hole filament after pretreatment is unwound from the silk tube placed horizontally and passes through the first wire guide rod, tension Adjusting rod, wire guide hook, second wire guide rod, third wire guide rod, rear wire guide wheel, front wire guide wheel, double roving is fed into the rear roller, middle roller, front roller through the bell mouth, and is clamped on the front roller The mouth is merged with the non-spandex single-hole filament output from the front guide wheel, and mechanically twisted after passing through the yarn guide hook to obtain a non-spandex single-hole filament core-spun yarn; The surface static friction coefficient between the tension adjusting rod and the non-spandex single-hole filament is 1.2~2 times that of the first guide rod and the non-spandex single-hole filament; the non-spandex single-hole filament passes through the tension adjusting rod The tension value is increased by 1.5~3 times; The oil content of the pretreated non-spandex single-hole filament is 0.3~0.5%; The distance between the rear godet wheel and the front godet wheel along the advancing direction of the yarn is 5-20cm. 2. the preparation method of a kind of non-spandex single-hole filament core-spun yarn according to claim 1, is characterized in that, the non-spandex single-hole long filament is carried out the process of pretreatment: the non-spandex single-hole long filament is first in Dry in air with a vacuum degree of -0.08~-0.05MPa and a temperature of 30~50°C for 12h, and then treat it in saturated water vapor at a temperature of 50~80°C for 10~20min. 3. the preparation method of a kind of non-spandex single-hole filament core-spun yarn according to claim 1, is characterized in that, non-spandex single-hole filament is single-hole nylon filament, single-hole polyester filament or single-hole polypropylene fiber Filament, double roving as cotton, viscose, modal, lyocell, polyester staple, nylon staple or acrylic staple. 4. the preparation method of a kind of non-spandex single-hole filament core-spun yarn according to claim 1, is characterized in that, the first wire guide rod, the second wire guide rod, and the third wire guide rod are made of stainless steel. 5. the preparation method of a kind of non-spandex single-hole filament core-spun yarn according to claim 4, is characterized in that, the diameter of tension adjustment rod is 30～80mm; The vertical projection distance is 10~40cm, and the horizontal projection distance is 0~20mm. 6. The preparation method of a non-spandex single-hole filament core-spun yarn according to claim 1, wherein the distance between the bell mouths is 2 to 10 mm. 7. The method for preparing a non-spandex single-hole filament core-spun yarn according to claim 1, wherein the count of the non-spandex single-hole filament core-spun yarn is more than 32S.

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