KR100505503B1 - Manufacturing method of gastric nylon Taesodo company by Piowai method - Google Patents

Abstract

The present invention is a manufacturing method of the nylon 210 denier for gastric use, in the production of gastric nylon yarn by winding at a speed of 3,500 to 4,000 m / min by POY method, the draw ratio is 1.20 to 1.40 and the relaxation rate is 4 to 6% Characterized in that manufactured by.

Nylon yarn prepared by the present invention has a strength of 4.6 ~ 5.0g / d, elongation is 55 ~ 60% and does not delay delay when used as the weft of the fabric because there is no delay shrinkage.

Description

Manufacturing method of gastric nylon Taesodo company by Piowai method

The present invention relates to a method for manufacturing a gastric nylon Taesumdo Co., Ltd. by POY (Partially Oriented Yarn) method, and more specifically, a nylon 6 chip having a sulfuric acid relative viscosity (96% sulfuric acid concentration) of 2.0 to 2.8 level as a POY method. The present invention relates to a method for producing gastric nylon yarn having a degree of fineness of 210 deniers by direct radial drawing.

In general, nylon yarns produced by the POY process are unstable in physical properties, so they may be supplied to post-processing companies after stabilizing their properties through a separate drawing process, or may be supplied as they are under conditions of limited use or weaving speed. do. However, the yarn supplied in the state of POY yarn has properties (strength, elongation, shrinkage, etc.) that are not suitable for the speed of weaving (800 rpm or more) as it is currently, so when it is used as a warp yarn, Defects in the direction of inclination), such as defects in the quality of the processed product and degradation of the weaving rate due to the rupture of the warp, and when used as weft yarns, wefts in the form of elongated edges (defects in the weft direction) Has a fatal defect in which the work quality is greatly reduced.

Of course, in the case of POY, which is supplied through the stretching process, the above-mentioned problems are alleviated somewhat. However, in this case, it is not desirable for the yarn producer because there are problems such as an increase in manufacturing cost and a decrease in productivity due to a separate process. It was.

Currently used for warp knitting or woven fabrics, nylon yarn produced by POY method is mainly 40, 70 or 100 denier, and is produced at a higher spinning speed than conventional method, so it has high productivity. However, compared to nylon, which is manufactured by the recent FDY (Fully Oriented Yarn) method, the quality and elongation are greatly inferior.

The most serious problem in the case of using nylon yarn manufactured by the POY method as the light and weft of the fabric is that it cannot be used in a high-speed loom because of the low strength and high elongation of the nylon yarn. However, POY production equipment is more powerful than a certain level because it is difficult to pull out the wound cake due to the high delay shrinkage of nylon when the draw ratio is increased regardless of the presence or absence of a Goet Roller. It is very difficult to increase and decrease elongation.

For this reason, it is very difficult to improve the quality of POY, and replacing the current POY facilities with FDY facilities can improve the properties, but there is a problem of costly investment.

The present invention solves the problems as described above, by using a POY facility, but at a draw ratio higher than the draw ratio of the conventional POY method by high-modulus nylon yarn to prevent the occurrence of elongated form of the elongated edge and at the same time stress The purpose of this invention is to provide a method of effectively producing a weaving nylon tasman yarn that does not cause any problems due to delayed shrinkage by providing excellent shape stability at the same time as reducing the absolute size of the deformation of the fabric. have.

The present invention will be described in detail with reference to the drawings. Sintered nylon 6 chips with a sulfuric acid relative viscosity (96% sulfuric acid concentration) of 2.0 to 2.8 and a moisture content of 0.05% or less are melt spun at a temperature of 250 to 255 ° C. Using a spinneret (1) having a diameter of 0.4 mm and a L / D (length / diameter) of about 2.5 to 3.0, the polymer having exited the spinneret (1) was subjected to a cooling wind velocity of 0.4 to Optimized cooling by cooling with a cooling wind with a cooling wind temperature of 14 to 18 ° C at 0.6 m / sec., Through the upper and lower two-stage oil ring rollers (4) and (5) through the quench section. After imparting an emulsion of 8 to 12%, it is passed through a first go roller 6, which is operated at a speed of 3,000 to 3,800 m / min, and is drawn at an elongation ratio of 1.20 to 1.40 between the second go rollers 7. The drawn yarn is given a relaxation of 4 to 6% and is wound at 3,500 to 4,000 m / min in the winding roller 8.

The present invention is treated with a sufficient amount of emulsion so as to easily stretch the cooled solid yarn, and then stretched at a draw ratio of 1.20 to 1.40 higher than that of the conventional POY method, and then gives sufficient relaxation of 4 to 6% before winding. And low elongation is expressed and does not generate gastric muscle when used as a weft for fabrics.

In addition, the nylon yarn produced by the present invention does not generate a delay shrinkage phenomenon.

In addition, the present invention can economically produce a nylon yarn comparable to the physical properties of the yarn produced by the facility without the need for expensive equipment such as FDY facilities.

Example 1

A nylon chip with a sulfuric acid relative viscosity of 2.5 was melted at a temperature of 255 ° C, followed by melt spinning through spinnerets having 34 holes, L / D of 2.8, and hole diameter of 0.30 mm. The first gourd roller (6) operated at a speed of 3,000 m / min after the cooled thread (2) was imparted with 11% emulsion through the upper and lower oil ring rollers (4) and (5). After passing through the second high roller (7) was stretched at a draw ratio of 1.30, and then given a 5% relaxation, wound at 3,700m / min to produce 210 denier yarn. The physical properties of the nylon yarn and the processed product when used as the weft for the fabric were shown in Table 1.

Example 2

The yarns were manufactured in the same manner as in Example 1 except that the upper and lower oiling rollers (4) and (5) were provided with an emulsion of 8.0 to 9.0%, and used as the physical properties of the nylon yarn and the weft for the fabric. The processed product was as in Table 1.

Example 3

The number of holes is 48, and the jet oiling device is installed at the point 2m directly below the spinneret 1, and one more oil emulsifying device is added. It was prepared, the physical properties of the nylon yarn and the processed product when used as a weft for the fabric was shown in Table 1.

Comparative Example 1

Except for the draw ratio is 1.03 to 1.10 except that the yarn was prepared in the same manner as in Example 1, the physical properties of the nylon yarn and the processed product when used as a weft for the fabric was as Table 1.

Comparative Example 2

The yarn was manufactured in the same manner as in Example 1 except that the draw ratio was 1.03 to 1.10, and the upper oil ring roller gave an emulsion of 2.0 to 4.0%. The nylon yarn was used as a physical property and a weft for the fabric. The processed product was as in Table 1.

Yarn Properties Processing article of the textile Strength (g / d) Elongation (%) Shrinkage (%) Example 1 4.85 58.9 9.1 W2-W3 ′ Example 2 4.82 57.6 9.0 W3 ′ Example 3 4.96 55.4 9.3 W2-W3 ′ Comparative Example 1 4.37 60.9 7.3 W3 ′ Comparative Example 2 4.42 61.3 8.6 Altar

1) Shrinkage rate is non-shrinkage rate (BWS).

2) The processed product was evaluated as follows.

W2-W3 '; Any coating is possible (with few defects of fabric)

W3 '; Can be coated for a limited use (some fabric defects but overall

In good condition)

Buddhist altar; The fabric is too bad to be used

Since the nylon yarn manufactured by the present invention has high strength and low elongation compared to conventional yarns produced by the conventional POY method, it does not generate a defect in the weft direction, that is, the gastrocnemius when it is used as the weft of the fabric, and gives a lot of relaxation when winding up. There was no problem caused by delayed contraction.

The nylon yarn produced by the present invention was 210 denier / 34 to 48 filament (single yarn fineness of 4 to 6 denier) yarn, the strength was 4.6 to 4.96 g / d, the elongation was 55 to 60%, and the shrinkage was 7 to 10%.

1 is a process schematic diagram of the present invention

<Explanation of Signs of Major Parts of Drawings>

1: spinneret, 2: filament, 3: cooling wind supply device,

4: upper oil ring roller, 5: lower oil ring roller, 6: 1st high roller,

7: 2nd roller, 8: winding roller

Claims (1)

After melt spinning the nylon chips, cooling, solidifying, oiling, and stretching them, they are wound at a speed of 3,500 to 4,000 m / min to produce 210 denier nylon yarns. A method for producing gastric nylon taysum yarn by the POY method, characterized by cold stretching at 1.40 and relaxing by 4 to 6% before winding up.