KR101194274B1 - A Method for Producing Spun Dyed Nylon Yarn - Google Patents

Abstract

The present invention relates to a method for producing nylon primary yarn for fishing nets, and more particularly, to a method for producing nylon primary yarns by giving the spinning oil the lowest in a range that does not affect radioactivity. The method according to the invention comprises the steps of obtaining a nylon chip; Mixing the nylon chip and the black masterbatch at a predetermined weight ratio; Melting and spinning the mixed nylon chip to prepare undrawn yarn; Imparting a spinning emulsion to the prepared non-drawn yarn; A method of manufacturing a nylon primary yarn comprising the step of stretching and relaxing an undrawn yarn with an emulsion attached on a plurality of Godet rollers, the nylon chip such that the content of carbon black in the yarn that is produced is 0.2 to 2.0% by weight. And a black masterbatch, and the spinning emulsion is added at 0.1 to 0.5%.

Fishnets, Nylon Butcher, Masterbatch

Description

A method for producing spun dyed nylon yarn

Figure 1 schematically shows a manufacturing process of the nylon primary yarn according to the present invention.

2 illustrates an exemplary method of measuring the friction coefficient of a yarn.

The present invention relates to a method for producing nylon primary yarn for fishing nets, and more particularly, to a method for producing nylon primary yarns by giving the spinning oil the lowest in a range that does not affect radioactivity.

Generally, in order to manufacture a woven fabric of a specific color, two methods of dyeing and then weaving a general polyamide yarn are used. However, since both methods go through the dyeing process, a lot of waste water is generated during the washing process after dyeing, which may cause environmental problems, and the dyeing of the final product may not be uniform because the dye adsorption degree is different during the dyeing process. White yarn for fishing nets is manufactured through processes such as weaving, refining, dyeing, washing with water, heat treatment and finishing resin treatment. Since this process takes several steps, the manufacturing cost and the treatment cost of the saline wastewater by a separate dyeing process are required.

The present invention is to solve the problems occurring in such a conventional dyeing process has the following object.

The present invention mixes and spuns the black masterbatch in a certain weight ratio on a white chip used in the manufacture of conventional high strength nylon yarns, and the spinning yarn has a maximum of as long as the spinning emulsion does not affect the radioactivity in order to increase the coefficient of friction. It is a manufacturing method and the method of the high-strength nylon primary yarn manufactured by giving as low as. The yarn manufactured according to the present invention relates to a high strength nylon yarn with a high coefficient of friction. The high-strength nylon primary yarn according to the present invention exhibits excellent light resistance and friction characteristics compared to the conventional white high-strength nylon yarn and has the advantage that a separate dyeing process is unnecessary.

It is an object of the present invention to provide a method for producing a nylon primary yarn for fishing nets without a post-dyeing step.

Nylon yarns prepared according to the method of the present invention have excellent light resistance and friction coefficient values of high yarns.

According to a suitable embodiment of the present invention, obtaining a nylon chip; Mixing the nylon chip and the black masterbatch at a predetermined weight ratio; Manufacturing a non-drawn yarn by melting and spinning the mixed nylon chips; Imparting a spinning emulsion to the prepared non-drawn yarn; The method for producing a nylon primary yarn comprising the step of stretching and relaxing an undrawn yarn with an emulsion attached on a plurality of Godet rollers comprises nylon chips and black so that the content of carbon black in the prepared primary nylon is 0.2 to 2.0% by weight. The masterbatch is mixed and the spinning emulsion can be imparted from 0.1 to 0.5%.

According to another suitable embodiment of the present invention, the spinning emulsion may be uniformly dispersed by the emulsion applying device.

According to another suitable embodiment of the present invention, a nylon primary yarn made by the present method may be provided.

According to another suitable embodiment of the present invention, the manufactured yarn comprising: 1) fineness of the monofilament of the yarn: 20 to 40 denier; 2) strength of the primary yarn: 7.0 to 8.5 g / d; 3) boiling shrinkage of the primary yarn: 8.0-15.0%; 4) stretch of distal yarn: 18.0 to 26.0%; And 5) brightness color value of yarn (L *): 10 to 20;

According to another suitable embodiment of the present invention, the yarns produced are static friction F / M coefficient value of 0.130 to 0.200, F / F coefficient value of 0.300 to 0.400, dynamic friction F / M coefficient value of 0.280 to 0.400 and F / Properties of F coefficient of 0.380 to 0.450 are shown, and the static friction is measured with the yarn flowing at a speed of 2 cm / min and the dynamic friction with the yarn flowing at 10 m / min, and F / M and F / F are respectively Friction between yarn and metal and coefficient of friction between yarn and yarn.

According to another suitable embodiment of the present invention, a net for fishing nets including nylon primary yarns may be provided.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

The percentages of percentages refer to percentage by weight unless the invention is specifically indicated in the description.

The method for producing a nylon primary yarn of the present invention comprises the steps of: A) obtaining a nylon chip having a relative viscosity (RV) of 2.80 to 3.80 and a moisture content of 800 ppm or less; B) mixing the nylon chip and the black masterbatch at a predetermined weight ratio; C) preparing a non-drawn yarn by melt spinning the mixed nylon chip at a spinning temperature of 255 to 280 ° C. and then solidifying the mixed nylon chip; D) to give spinning workability of the unstretched yarn to facilitate the spinning work, and to give the spinning yarn with high coefficient of friction characteristics, to give a spinning emulsion of 0.5% to 0.1% and to make the attached oil uniformly dispersed in the unstretched filament. Applying a disperser; E) drawing and relaxing the unstretched yarn having the oil agent attached thereto on a high-det roller by adjusting the temperature of the high-det roller GR4 to 195 to 225 ° C. under conditions of a draw ratio of 4.00 to 5.50 and a relaxation rate of 3.5 to 5.5%. It includes.

In addition, the mixing ratio of the nylon chip and the black masterbatch in step B) may be adjusted so that the content of the carbon black particles in the prepared original nylon is 0.2 to 2.0 weight percent (wt%).

Nylon primary yarn prepared according to the method of the present invention may have the following physical properties.

1) Fineness of monofilament of primary yarn: 10-40 denier,

2) strength of the primary yarn: 7.0 to 8.5 g / d,

3) boiling shrinkage of the original yarn: 8.0-15.0%,

4) body of the original yarn: 18.0 to 26.0%,

5) Brightness color value of yarn (L *): 10-20.

6) Oil peak up of yarn: 0.5 or less.

7) Static friction coefficient value: 0.130 to 0.200 for fibers and metals, 0.300 to 0.400 for friction coefficients between fibers and fibers, 0.280 to 0.400 for fibers and metals, and 0.380 for fibers and fibers. To 0.450.

Figure 1 schematically shows a process for producing a nylon yarn in accordance with the present invention.

In order to prepare a nylon primary yarn according to the present invention, a dry nylon chip and a black masterbatch chip are mixed at a predetermined ratio, and the filament yarn must be spun through the spinneret 10 from the molten polymer. The spun filament yarn is passed through the quench zone and then the spinning emulsion is attached with an appropriate amount of emulsion application device 16. After that, the undrawn yarn formed by uniformly dispersing the spinning emulsion in the filament yarn through the air interlocker passes the unheated first Godet roller (GR1) 11. Then, a slight tension is applied while passing through the second goth roller GR2 12 heated to an appropriate temperature. The tensioned filament yarn is stretched while passing through the third and fourth high-det rollers GR3 and GR4 13 and 14, which are maintained at a constant temperature, to express strength. The stretched filament yarn is relaxed through the fifth goth roller GR5 15 to be wound around the winding roller 17 at a speed of 2,400 m / min or more. The method for producing the nylon primary yarn through this process is called a spin draw method.

According to the present invention, the mixing ratio of the black master batch chip can be adjusted so that the content of carbon black particles in the final nylon yarns is 0.2 to 2.0 wt%. When the content of the carbon black particles is less than 0.2wt%, it is difficult to express uniform color, and when the content of the carbon black particles exceeds 2.0wt%, there is no effect of expressing the color value, and the carbon black particles act as foreign matters, which lowers the radio workability. Problems may arise. Since the carbon black particles are included in the yarns of the yarns, the friction coefficient can be very low, thereby significantly increasing the defective rate during the process of rewinding and netting the yarns of the yarns. Therefore, it is possible to use the emulsion applying device 16 to impart a spinning emulsion to 0.5% or less to increase friction and to increase spinning property by increasing dispersibility. The draw ratio of the prepared non-drawn yarn may be 4.00 to 5.50. If the draw ratio is less than 4.00, it is difficult to express strength due to low orientation, and if it exceeds 5.50, it may be overstretched, resulting in short trimming and deterioration of workability or complete trimming.

According to the present invention, the temperature of the fourth Godet roller (GR4) 14 may be adjusted to 195 to 225 ° C under conditions of 3.5 to 5.5% relaxation rate. If the temperature of the fourth Godet roller (GR4) 14 is less than 195 ℃, the thermal effect is insufficient, the relaxation efficiency is lowered, the desired boiling shrinkage can not be obtained, and if it exceeds 225 ℃, the yarn strength is lowered by thermal decomposition And the tar generation of the roller is increased, the workability can be lowered.

In the following a specific embodiment of the present invention is presented. The examples presented are exemplary and are not intended to limit the scope of the invention.

Evaluation of the physical properties of the yarn prepared in Examples and Comparative Examples was made by the following method.

Property evaluation method

1) How to measure the color of the yarn (L *)

A test specimen was prepared by winding the yarn for measurement 500 times or more on a board composed of a constant width (10 cm) and a length (20 cm), and the average value was obtained by measuring three times under daylight (D65) illumination using a colorimeter.

2) Boiling rate measurement method

After 1 m of yarn was left in 100 ° C. boiling water for 30 minutes, the length of the sample was measured to obtain the ratio of the reduced length to the original length as a percentage.

3) How to measure the friction coefficient of yarn

The yarn was obtained by using the load value applied to the load cell by varying the yarn slope according to the method of obtaining the friction coefficient between the fiber and the fiber and the metal and the fiber by using the apparatus as shown in FIG. 2.

In Figure 2, each friction coefficient was measured by the following method.

-Dynamic friction: measured by flowing yarn at high speed (10m / min);

-Static friction: measured at 2cm / min by flowing yarn at low speed;

Friction between the yarn and the metal (F / M) = (F2-F1) / (F2 + F1);

Friction with the sour (F / F) = (F2'-F1 ') / (F2' + F1 ');

4) How to measure the elongation of yarn (ASTM D2256)

After the yarn was left for 24 hours in a constant temperature and humidity room at 25 ° C. and 65% RH, the samples were measured by a tensile tester using the ASTM 2256 method.

Example

Example 1

Nylon chips having a relative viscosity of 3.38 and black master base chips containing 20 wt% of carbon particles were supplied at 1.8 wt% and mixed so as to have a carbon content of 0.36 wt% in the final yarns. The unstretched yarn was manufactured by melting at an extruder at a spinning temperature of 270 ° C., spinning through a spinning nozzle, and winding at a speed of 576 m / min on a first goth roller GR1. Undrawn yarn was drawn at a draw ratio of 4.51 and treated at a relaxation rate of 5.0% and a temperature of 205 ° C. of the fourth Godet roller (GR4) to prepare yarns of 630 denier and 21 filaments.

The prepared yarn was left in a standard state for 24 hours to evaluate its physical properties, and the strength was 7.8 g / d; Body 23.0%; Boiling shrinkage of 10.8%; Color (L *) value 17; Emissive oil content is 0.45%; Static friction F / M value 0.140; Static friction F / F value 0.340; The dynamic friction F / M value is 0.310; And it was confirmed that a high-strength nylon primary yarn with a dynamic friction F / F value of 0.395;

Example 2

Nylon chips having a relative viscosity of 3.38 and nylon containing 20 wt% of carbon particles were supplied by mixing 3.0 wt% of the master base chip as a base so that the carbon content in the final yarn was 0.60 wt%. It melt | dissolved in the extruder at the spinning temperature of 270 degreeC, was spun through the spinning nozzle, and wound up at the speed of 576 m / min by the high-det roller GR1. Undrawn yarn produced draw ratio 4.51; Relaxation rate 5.0%; And the temperature of the Godet roller GR4; Treatment at 205 ℃ to produce 630 denier, 21 filament yarn.

The prepared yarn was left in a standard state for 24 hours to evaluate its physical properties, and the strength was 7.8 g / d; Body print 25.0%; Boiling shrinkage of 8.8%; Color (L *) value 14; Emissive oil content is 0.45%; Static friction F / M value 0.135; Static friction F / F value 0.320; Dynamic friction F / M value 0.302; And it was confirmed that the high-strength nylon primary yarn with a dynamic friction F / F value of 0.364;

Comparative example

Comparative Example 1

Nylon chips having a relative viscosity of 3.38 and nylon containing 20 wt% of carbon particles were mixed by supplying 0.9 wt% of the base master base chip, that is, 0.18 wt% of the carbon content in the final yarn. It melt | dissolved in the extruder at the spinning temperature of 270 degreeC, was spun through the spinning nozzle, and wound up at the speed of 576 m / min by the high-det roller GR1. Stretched ratio of the prepared non-drawn yarn to 4.51; Relaxation rate 5.0%; And the raw yarn of 630 denier and 21 filament was manufactured by processing at the temperature of 205 degreeC of the high-det roller GR4.

The prepared yarn was left in a standard state for 24 hours to evaluate its physical properties, and the strength was 8.4 g / d; Section 18.0%; Boiling shrinkage 13.0%; And it was confirmed that the original yarn with a low density of the color having a color (L *) value 22;

Comparative Example 2

A nylon chip having a relative viscosity of 3.38 and a master base chip having a nylon base containing 20 wt% of carbon particles were supplied at 12 wt% and mixed so that the carbon content in the final yarn was 2.4 wt%. It melt | dissolved in the extruder at the spinning temperature of 270 degreeC, was spun through the spinning nozzle, and wound up at the speed of 576 m / min by the high-det roller GR1. The draw ratio of the prepared non-twisted yarn was 4.51; Relaxation rate of 5.0%; And the raw yarn of 630 denier and 21 filament was manufactured by processing at the temperature of 205 degreeC of the high-det roller GR4.

The prepared yarns were left standing for 24 hours in a standard state, and the strength was 6.8 g / d; Body weight 26.0%; Boiling shrinkage is 7.0%; And it was confirmed that a dark nylon yarn was prepared with a dark density of the color (L *) value of 9.

Comparative Example 3

Prepared as in Example 1 and to give a spinning emulsion 0.7% to prepare an original yarn.

The yarn produced was static friction F / M value 0.090; Static friction F / F value 0.230; Dynamic friction F / M value 0.208; And it was confirmed that the nylon primary yarn with a dynamic friction F / F value of 0.275;

The present invention has been described above in detail using the examples. It is apparent to those skilled in the art that the presented embodiments are exemplary and that many modifications and variations of the embodiments can be made without departing from the spirit of the invention. The invention is not limited by these modifications and variations, but only by the claims appended hereto.

Nylon yarn manufactured according to the method of the present invention has a high strength and the brightness value of the color difference meter (L *) is about 10-20 colors and can omit the dyeing process when manufacturing the net for fishing nets and impart friction characteristics. It has the advantage that it can be utilized as a yarn of an excellent industrial fishing net fabric.

Claims (6)

Obtaining a nylon chip; Mixing the nylon chip and the black masterbatch at a predetermined weight ratio; Melting and spinning the mixed nylon chip to prepare undrawn yarn; Imparting a spinning emulsion to the prepared non-drawn yarn; In the method for producing a nylon primary yarn comprising the step of stretching and relaxing the undrawn yarn with an emulsion attached on a plurality of Godet rollers, 10. A method for producing a nylon native yarn, characterized in that the nylon chip and the black masterbatch are mixed so that the content of carbon black in the prepared original nylon is 0.2 to 2.0% by weight, and the spinning emulsion is provided at 0.1 to 0.5%. The method of claim 1, wherein the spinning emulsion is uniformly dispersed by the emulsion applying device. Nylon primary yarn manufactured by the manufacturing method of claim 1 or 2. The method of claim 3, wherein the manufactured yarn    1) Fineness of monofilament of primary yarn: 20-40 denia;    2) strength of the primary yarn: 7.0 to 8.5 g / d;    3) boiling shrinkage of the primary yarn: 8.0-15.0%;    4) stretch of primary yarn: 18.0 to 26.0%; And    5) Brightness color value of yarn (L *): nylon raw yarn, characterized in that it has a physical property of 10 to 20; The method of claim 4, wherein the yarn is filament F / M coefficient value of 0.130 to 0.200, F / F coefficient value of 0.300 to 0.400, Dynamic friction F / M coefficient value of 0.280 to 0.400 and F / F coefficient value of 0.380 It has physical properties of 0.4 to 0.450, and the static friction is measured by flowing the yarn at a speed of 2 cm / min and the copper friction by flowing the yarn at 10 m / min, and the F / M and F / F are frictions between the yarn and the metal, respectively. And a coefficient of friction between the yarn and the yarn. Net for fishing nets comprising the nylon primary yarn of claim 5.

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