JPS62117846A - Plain fabric of nylon 6 fiber - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (Industrial application field) The present invention relates to a hand-woven fabric made of nylon 6 fibers.

(Prior Art) Conventionally, plain woven fabrics of nylon 6 fibers have used yarns obtained by a two-step method of spinning and drawing.

However, a need has arisen for flexible fabrics.

For this purpose, the present applicant proposed the use of nylon 6POY for the warp, as shown in Japanese Patent Application Laid-Open No. 60-45633.

This method uses nylon 6POY for both the warp and weft, and by specifying the characteristics of the threads that make up the woven fabric, a woven fabric with high drapability and dimensional stability was obtained, but the quality of the woven fabric lacked stability. It was something. In particular, transmuscular defects tended to occur frequently.

(Problems to be Solved by the Invention) The present invention aims to solve the above-mentioned drawbacks, and aims to obtain a plain woven fabric made of 6-region nylon fibers that is flexible and has good warp quality.

(Means for Solving the Problems) The present invention is a fabric whose warp is made of nylon 6 multifilament yarn obtained by high-speed spinning, dyed and finished, and whose warp has the following characteristics. To provide a satisfactory plain woven fabric of nylon 6 fibers.

■ Specific gravity 1.141 ±0.002 ■ Initial modulus on differential elastic modulus curve (E,) 17 ± 2 g/d Mid-term peak modulus (E,) 15 ± 3 g/d Modulus at cut point (El) 7 ± 2 g/d The yarn spun at high speed in the present invention is nylon 6 yarn spun at a high speed of 4000 m/min or more. Preferably 4,100 to 4,5
The yarn was drawn at a speed of 0.00 m/min. This yarn has an initial modulus (hereinafter referred to as E1) of approximately 1.
8 g/d, intermediate peak modulus (hereinafter referred to as ET) is approximately 7 g/d (no clear peak is expressed), and cut point modulus (hereinafter referred to as Ei) is approximately 7 g/d.
It is. This is used as the warp of the present invention. It stretches during weaving. For example, when a yarn produced at a take-up speed of 4.300 m/min is used as a warp, it is pulled out and woven while being elongated by about 6% from the beam. When using yarn obtained at a higher take-up speed, it is necessary to lower this elongation rate. For example, when using yarn obtained at a take-up speed of 5000 m/min, the elongation rate is about 4%. By the way, the elongation rate of conventional nylon 6 fibers during weaving is 13%~
-2%. If the yarn is to be drawn from the beam at a speed of 400 rotations/minute or more of the loom, the yarn is pre-intertwined.

It is best to avoid gluing. Entanglement is applied using an interlacer after applying an oil agent during high-speed spinning. The number of entanglements is preferably 10 to 30 entanglements/m.

The weft may be a nylon 6 multifilament yarn, and the manufacturing method may be any yarn obtained by a conventional two-step method or a high-speed spinning method. In particular, yarns obtained by high-speed spinning are preferred.

The dyeing process referred to in the present invention is a process in which finish setting is performed using normal dyeing conditions. For example, an acidic dye is used, and the dye is immersed for about 40 minutes at a maximum temperature of 100°C. The dyeing machine may be one commonly used for dyeing nylon fibers, such as a jigger, wince, or beam dyeing machine. Finishing set is 2-5%
This is done using hot air while pulling in the weft direction. Empirically, the cent conditions are as follows when a warp yarn of 70 denier/12 filament (hereinafter F denier is expressed as d and filament is expressed as [)] obtained at a take-up speed of 4300 m/min is used.

T= (-H+ 185) ± 3140≦
T≦170 where 'r: cent temperature (C) H-set time (seconds) In the present invention, the specific gravity of the warp of the plain weave fabric of nylon 6 fibers must be 1.139 to 1.143.

If it is less than 1.139, it will cause staining spots and cause transmuscular defects. When it is 1.143 or more, the obtained plain woven fabric has a hard texture. The specific gravity of the warp of conventional plain woven fabric is 1.149
It has a hard texture.

The method for measuring specific gravity is to take out only the warp threads from the fabric and use JIS 1.
It is carried out by the density gradient tube method of 013-74.2.

Other characteristics of the warp of the present invention include differential elastic modulus E;

ET and El are 17±2 g/d and 15±3, respectively.
g/d.

It needs to be within the range of 7±2 g/d, and if the upper or lower limit is exceeded at any point, the plain weave will have warp defects or a hard texture.

The differential elastic modulus curve is published in Fiber Science Society Journal VOL, 35 Kan 12 (19
79) Obtained from the load extension curve as described in T501 as follows.

The measuring machine used was 141 Shimadzu Autograph 5100 model, and the sample was deformed under the conditions of sample length 20 cm, tensile speed 20 cm/min, temperature at the time of measurement of 20 ± 2 °C, and relative humidity at the time of measurement of 65 ± 5%. The output data regarding the sample deformation rate and stress during the test were converted into pulses, converted into digital data, and then inputted online into a computing device. The human data is averaged using the three-point moving average method and then stored as S-8 curve data, and the differential elastic modulus is calculated from this memory using the numerical differential method. The differential elastic modulus curve has stress (g/d) on the horizontal axis,
The elastic modulus (g/d) is plotted on the vertical axis.

- As an example, FIG. 4 shows a differential elastic modulus curve for a nylon drawn yarn produced by the two-step spinning and drawing method. The stress used was a value calculated by inputting the initial fineness of the sample in advance.

The formula for calculating the differential elastic modulus is shown below.

Δε F : Load do : Initial fineness Lo : Initial sample length L : Length of the sample at load F In the differential elastic modulus curve, E is the elastic modulus at the peak point that occurs up to the yield point and is called the initial modulus.

E is the maximum modulus from the yield point to breakage, and is referred to as the mid-peak modulus (untreated yarn obtained by high-speed nylon 6 spinning does not exhibit a clear peak).

E is the modulus at the cut point.

(Function) The warp of the plain woven fabric used in the present invention is made by melting and extruding nylon 6, and is preferably 4,000 m for 7 minutes or more, preferably 4.1
The yarn specific gravity was about 1.128, El was about 18 g/d,
Er is approximately 7 g/d.

Em is approximately 7 g/d. The gray fabric woven using these warp threads with 6% elongation has a specific gravity of approximately 1.137. E, is about 17g
/d, Et is about 18g/d, Ell is about 7
g/d. Due to further dyeing and finishing setting, it shrinks slightly in the warp direction, but the specific gravity is 1.14.
1.

E is about 17g/d, Ea is about 15g/d, E++ is 7
g/d. Although E after processing may be unclear, it is the differential elastic modulus at the same position (stress) as Et of the gray fabric. There is almost no change in E at each stage. If the elongation of the warp threads during weaving is reduced, the greige material is BiE+,'
Ey tends to decrease and the peak lacks clarity. In other words, if the warp elongation during weaving is 3% or less, E of the present invention
, and it becomes difficult to confirm ET even in gray fabrics.

Furthermore, it is necessary to appropriately select the finishing conditions after dyeing.

For example, 70d/1 melt spun at 4.300m/min.
If 2f is used for the warp, use the following temperature condition.

Unless it is simultaneously stretched 2 to 5[chi] in the weft direction, it will not show the differential elastic modulus curve defined in the present invention.

T= (-H+185)±3140≦T≦170However,
T: Set temperature ("C) H: Set time (seconds) It is thought that the warp yarns exhibiting such a characteristic differential elastic modulus curve have a great influence on the effects of the present invention.

The differential elastic modulus curves at each stage of the warp in the present invention will be compared with those of the warp obtained by the conventional spinning/drawing step method, and will be explained with reference to the figures. All figures are differential elastic modulus curves of nylon 6 multifilament.

Fig. 1 shows the warp of the processed cloth of the present invention, Fig. 2 shows the warp yarn used in the invention, and Fig. 3 shows the warp of the same gray fabric.

FIG. 4 shows a case of a conventional warp yarn, FIG. 5 shows a case of a conventional gray machine warp, and FIG. 6 shows a case of a conventional warp of a dyed finished set cloth. The vertical axis represents elastic modulus (g/d) and the horizontal axis represents stress (g/d). In particular, the level of E is greatly different between the present invention and the conventional one, and the point at which it appears is also greatly different. In the case of the present invention, ET is applied at a stress of 1.1 g/d.
In contrast, the conventional one has E7 at a stress of 2.3 g/+f.

Regarding I El, there is almost no change in the present invention, but there is a large change in the conventional one, and the warp of the processed cloth is below the level of the present invention. Regarding E8, there is no change in either case, but the level of the one according to the present invention is high. It is believed that these differences interact subtly with the relatively low specific gravity to produce a soft nylon fabric with fewer warp defects, which is an effect of the present invention.

(Example) Next, the present invention will be specifically explained with reference to Examples.

Nylon 6 with a relative viscosity of 2.6 was measured at a temperature of 25°C by dissolving 1 g of a sample in 100 CC of sulfuric acid with a concentration of 96%.
The polymer was melt-spun at 265°C, taken up under the conditions shown in Table 1, and then either as it was or stretched to yield 190 fibers/2.
．． It was used as a warp of 5 cm taffeta (warp density: 107 pieces/2.5 cm, weft density: 83 pieces/2.5 cm).

Before high-speed (3500 m/min or more) take-up, interlacing treatment was performed between the two oil rings and each oil ring. The brands of the yarns obtained were all 70d/12f.

The degree of entanglement was 15 cases/m. Similarly, 70 for weft
A yarn of d/24 f was obtained. The degree of entanglement was 4 cases/m.

Specific gravity, E+, ET, and Ee are also shown in Table 1 as characteristic values. Using these yarns, taffeta was woven in various combinations using a water jet loom at an operating speed of 650 times/min. The elongation rate of the warp yarns at this time is shown in Table 2.

The results of investigating the characteristics of this taffeta are listed in Table 2. The obtained gray cloth was dyed with 5upranol Cyan.
Staining was carried out under the following conditions: ine G O, 3X owf, heating at 98° C./40 minutes, and staining time after heating for 40 minutes.

Table 1 Spinning conditions and characteristic values 1.5χ in the weft direction for 20 seconds with hot air at 165°C after dyeing
I did the finishing set while pulling.

1VhA-E, H, M, and N are comparative examples, and A and B are warp yarns used in conventional taffeta.9 They all deviated from the characteristics regulated by the present invention and had a hard texture. Also B
Because the weaving elongation rate was too high, excessive tension was applied to the warp threads, resulting in frequent fuzzing. C2D had low E+, and C had low E7.

Therefore, although it was very soft, it had many transmuscular defects.

E, H and N have low E.

M had a high Ea, and transmuscular defects occurred in both cases. On the other hand, F, G, 1.
J, N, and L had satisfactory soft textures, and no warp muscles occurred.

(Effects of the present invention) By adopting the structure of the present invention, it was possible to obtain a plain woven fabric of nylon 6 fibers with a soft texture and good warp quality.

[Brief explanation of drawings]

All figures show differential elastic modulus curves. Fig. 1 shows the warp of the processed fabric of the present invention, Fig. 2 shows the warp used in the invention, Fig. 3 shows the warp of the gray fabric of the invention, and Fig. 4 shows the warp used conventionally.
FIG. 5 shows the warp of a conventional gray fabric. FIG. 6 shows the warp of a conventional processed fabric.

Claims (2)

[Claims] (1) A plain woven fabric of nylon 6 fibers whose warp yarns are made of nylon 6 multifilament yarns obtained by high-speed spinning, which are dyed and finished, and whose warp yarns satisfy the following characteristics. (1) Specific gravity 1.141±0.002 (2) Initial modulus in differential elastic modulus curve (E_1) 17 ± 2 g/d Mid-term peak modulus (E_T) 15 ± 3 g/d Modulus at cut point (E_B) 7 ± 2 g/d