JP3273996B2 - Nylon 6 non-twisted, glueless yarn for warp - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of drawing without spinning after spinning, that is, a nylon 6 multifilament yarn produced by a spin draw method. It relates to a suitable non-twisted, non-adhesive yarn for nylon 6 for warp.

[0002]

2. Description of the Related Art In the production of synthetic fiber fabrics, it is desired to reduce the production cost of raw yarns, secure stable operability in a high-speed weaving process, and improve the quality of fabrics.
As for the nylon 6 fabric, attempts have been made to use a highly oriented undrawn yarn having a spinning speed of 3500 m / min or more for fabrics in order to reduce the production cost of the original yarn.

[0003] However, nylon 6 highly oriented undrawn yarn is excellent in dyeability, but has drawbacks of high elongation and low strength, and low boiling water shrinkage and thermal stress value. For this reason,
If used in the weaving process in a non-twisted, glueless state, fluff and yarn breakage occur frequently, especially in a fluid jet loom characterized by high speed rotation represented by a water jet loom or an air jet loom. The tendency was remarkable, and there was a problem in practical use.

[0004] Further, since the highly oriented undrawn yarn of nylon 6 has a low boiling water shrinkage and a low thermal stress value, the movement of the filament due to shrinkage is small. There is a strong tendency to be. For this reason, there is a problem that the lead mark and the interlace interlaced portion remain as they are, and an irritating defect occurs in the fabric.

[0005]

DISCLOSURE OF THE INVENTION The present invention solves the above-mentioned problems and is a yarn obtained by a spin draw method. An object of the present invention is to provide a nylon 6 non-twisted, non-adhesive yarn for warp, which is capable of weaving a fabric with less generation of fluff and yarn breakage and less stain spots with good operability. .

[0006]

Means for Solving the Problems The present inventors have made intensive studies to solve the above-mentioned problems, and as a result, have reached the present invention.

That is, the present invention relates to a nylon 6 multifilament yarn which is drawn without winding after spinning, and has a tenacity of D × 0.3 g (D
Is greater than or equal to total denier), the shrinkage of boiling water as a whole yarn is 9.0% or more, and the maximum thermal stress is 0.15 g / d.
In addition, the gist of the present invention is a non-twisted, non-adhesive yarn for nylon 6 for warp, wherein the number of entanglements is 10 to 40 / m.

The method for measuring physical properties in the present invention is as follows. Strength: Measured by the method of JIS L-1013. Boiling water shrinkage: Measured by the method of JIS L-1013. Maximum thermal stress: KET- manufactured by Kanebo Engineering
Using an I-type thermal stress meter, apply an initial load of 0.015 g / d to the sample, and measure at a heating rate of 300 ° C./180 seconds. A thermal stress curve is drawn based on the measured values, and the maximum value is defined as the maximum thermal stress.

Hereinafter, the present invention will be described in detail. First, in order to perform weaving with good operability, in the present invention, it is necessary to set the tenacity per single yarn constituting the yarn to D × 0.3 g or more. The load applied to the yarn during weaving is not evenly applied to the individual yarns that compose the yarn, but the maximum load is applied to one or two strained single yarns of one yarn. Is what is done. Therefore, the strength per single yarn is D × 0.3 g
If the ratio is less than 1, it is not preferable because in the high-speed weaving step, several single yarns are broken and fluff is generated, or many single yarns are broken and yarn breakage occurs, resulting in poor operability.

[0010] Next, the boiling water shrinkage as a whole yarn is 9.0
% And the maximum thermal stress must be 0.15 g / d or more. If the boiling water shrinkage is less than 9.0%, the movement due to shrinkage is small, so that the filament arrangement of the greige is maintained as it is in the dyeing process, which causes an irritating defect, which is not preferable. The maximum thermal stress is 0.15g /
If it is less than d, the shrinkage force against heat is small, so that an irritating defect occurs similarly to the above, which is not preferable.

The yarn of the present invention has physical properties such that the tenacity per single yarn denier is D × 0.3 g or more, the boiling water shrinkage as a whole yarn is 9.0% or more, and the maximum thermal stress is 0.15 g / d or more. With 10-40 pieces / m, preferably 10-25 pieces / m
m must be involved. If the entanglement is less than 10 pieces / m, the bunching property is lacking. Therefore, when woven using warp yarns, fluff or single yarn breakage occurs due to friction between warp yarns or metal parts in contact with warp yarns. If the entanglement exceeds 40 pieces / m, the entangled portion remains in the woven fabric, resulting in an irritated defect, and the quality of the fabric deteriorates.

As a method for obtaining the yarn of the present invention, for example, spinning is performed at a low spinning speed of 1000 m / min to 2000 m / min, and hot drawing is performed 2.0 to 4.0 times through a hot plate or a heat roller. After that, while giving confounding of 10-40 pieces / m, 3000
There is a method of winding at a high speed of up to 5000 m / min. Regarding the spinning speed and the draw ratio, the draw ratio may be determined according to the spinning speed in the above range. However, in order to obtain the yarn of the present invention with good operability, the spinning speed is set to 1000 m / min to 2000 m / min. ,
Preferably, the stretching ratio is 2.5 to 3.5 times.

[0013] The temperature of the heat plate or the heat roller at the time of performing the heat drawing is set to 120 to 150 so that the dyeing unevenness due to the setting unevenness does not occur at the time of heat setting and the orientation in the yarn length direction is uniform. It is preferably set to ° C.

Further, the yarn of the present invention is not limited to the cross-sectional shape and the like, and can be applied to a wide range of nylon 6 yarns.

[0015]

Next, the present invention will be described specifically with reference to examples.

Example 1 Relative viscosity (concentration 1 g / dl using 96% sulfuric acid as a solvent, temperature
Melting 2.6 nylon 6 chips at 2.6 ° C, spinning at a spinning temperature of 260 ° C from a 12-hole die at a spinning speed of 1500 m / min, cooling, a first codet roller and a second codet roller at 140 ° C Then, stretching was carried out 3.0 times, followed by an air entanglement treatment at an overfeed rate of 5.0% and an air pressure of 6.0 kg / cm ² to give a entanglement of 21 pieces / m and winding.

Example 2 Using a die having 16 holes, the draw ratio was set to 2.9 times, and
The same procedure as in Example 1 was carried out except that 28 entanglements / m were imparted.

Comparative Example 1 The temperature of the second codet roller was set to 160 ° C.
The procedure was performed in the same manner as in Example 1, except that confounding of m was given.

Comparative Example 2 Example 2 was carried out except that the fiber was spun at a spinning speed of 2500 m / min, stretched 2.0 times, and the temperature of the second codet roller was set to 130 ° C.
The same was done.

Comparative Example 3 The same procedure as in Example 1 was carried out except that the yarn was spun from a die having 24 holes and that the yarn was entangled at 32 yarns / m.

Comparative Example 4 The procedure of Example 1 was repeated except that the stretching ratio was 1.15.

Comparative Example 5 The same nylon 6 chip as in Example 1 was melted, and the spinning temperature was changed to 26.
It is spun at a spinning speed of 4200 m / min from a die having 12 holes at 0 ° C., cooled, passed through a first codet roller and a second codet roller without stretching, and then subjected to an air entanglement treatment to obtain 5 pieces / piece. Thus, a yarn with entanglement of m was obtained.

Table 1 shows various characteristic values of the yarns obtained in Examples 1 and 2 and Comparative Examples 1 to 5.

[0024]

[Table 1]

Next, each of these yarns is subjected to warping, weaving, and dyeing finishing according to the following woven fabric standards and weaving conditions as a non-twisted, glued-free warp, and the quality and weaving of the obtained fabric are performed. The operability is shown in Table 2. Textile standard: Product name-Nylon taffeta (plain weave) Total number of warp yarns-5200 warp density-107 yarns / 2.54 cm Weft yarn density-80 yarns / 2.54 cm Weaving conditions: Loom used-Water jet loom ZW-303 manufactured by Tsudakoma Kogyo Type Loom rotation speed-800 rpm

[0026]

[Table 2]

As is apparent from Table 2, when the yarns of Examples 1 and 2 are woven using the warp, the generation of fluff, the number of cuts of the yarn and the total number of stops are small, and the operability can be improved. The obtained fabric was good without any irritating defects after dyeing. On the other hand, the yarn of Comparative Example 1
Since the boiling water shrinkage ratio was lower than the range of the present invention, when woven using warp yarns, the resulting fabric had a fuzzy defect after dyeing. In addition, since the yarn of Comparative Example 2 has a lower strength per single yarn and a lower maximum thermal stress than the range of the present invention, when weaving using a warp, fluffing and cutting of the yarn frequently occur, and weaving operability is improved. The resulting fabric had a frayed defect after dyeing. Since the yarn of Comparative Example 3 had a lower tenacity per single yarn than the range of the present invention, when weaving using a warp, fluffing and cutting of the yarn occurred frequently, and the weaving operability was extremely poor. . Since the yarn of Comparative Example 4 had a maximum thermal stress lower than the range of the present invention, the obtained fabric had a fuzzy defect after dyeing. Further, Comparative Example 5 is a highly oriented undrawn yarn, so that only those having a boiling water shrinkage ratio and a maximum thermal stress lower than the range of the present invention can be obtained. The quality of the fabric was not satisfactory either.

[0028]

The nylon 6 non-twisted, non-adhesive yarns for warp of the present invention can be processed with good operability even when subjected to a weaving process by a high-speed weaving machine, with few occurrences of fluff and yarn breakage. By using the yarn of the present invention, it is possible to obtain a fabric having excellent dyeability and excellent quality. Moreover, since the present invention can be obtained by the spin draw method, it is possible to reduce the manufacturing cost.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) D02G 3/00-3/48 D01F 6/60

Claims (1)

(57) [Claims] Claims: 1. A nylon 6 multifilament yarn drawn without winding after spinning, wherein the strength per single yarn constituting the yarn is at least D × 0.3 g (D is total denier), and , The shrinkage of boiling water as a whole
Nylon 6 non-twisted, non-adhesive yarn for warp characterized by having a maximum thermal stress of at least 9.0%, a thermal stress of at least 0.15 g / d, and a entanglement number of 10 to 40 / m.