JPS6342014B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention is a thermoplastic synthetic fiber yarn having swirling torque, in which water or a liquid containing water as a main component (hereinafter referred to as water or aqueous liquid) is intermittently applied, and then heat treatment is performed. The present invention relates to a method for producing a specially processed yarn having swirling torque portions and low swirling torque portions intermittently along the longitudinal direction of the yarn. In recent years, woven and knitted fabrics made from synthetic fiber filament yarns have become increasingly popular in clothing due to their excellent properties such as washability, stretchability, and wrinkle resistance. There is something to watch. However, despite their excellent functionality, woven and knitted fabrics made from synthetic fiber filament yarns have a cold appearance and a waxy feel to the touch due to the uniformity and flatness of the yarns, giving the fabric an expressionless feel. It has become a reason why people don't like it. Conventionally, from this perspective, liquid treatment has been applied to eliminate the uniformity and flatness of multifilament yarn, and to eliminate bulky unevenness and unevenness in the longitudinal direction of the yarn.
Proposals have been made to obtain filament yarns having thread irregularities such as crimp irregularities and thickness irregularities. For example, while the yarn is running, an oscillating device applies vibrational energy to the yarn itself, causing it to pass while oscillating within a certain range. A method in which the bulkiness of the yarn portion is eliminated by bringing the fibers into intermittent contact with each other.
19096) and a method in which a solvent or the like is intermittently applied to bulky textured yarn while it is stretched, and furthermore, heat treatment is performed to cause the bulkiness of the attached areas to be lost (Japanese Patent Publication No. 39 - Publication No. 26161) is a typical example. However, these conventional techniques use a dissolving agent, a swelling agent, etc. for the supplied yarn, and the yarn portion to which these treatment agents are attached loses the bulkiness of the supplied yarn, and becomes a linear non-bulky portion. Therefore, the selection and usage of the treatment agent are extremely important and difficult.In reality, the yarn strength is extremely weak, resulting in yarn breakage during the yarn manufacturing process and weaving and weaving process. Frequent occurrence or deterioration of the strength of the woven or knitted product has been observed, and the threads have extremely different thinness and degree of convergence at the part where the treatment agent is attached, resulting in a marked lack of stability in the quality of the woven or knitted product. Furthermore, since the processing effect is largely influenced by the time factor, production speed is limited.
The cost of the yarn obtained is relatively high. Also a solubilizer,
There is a concern that residual swelling agents may have adverse effects on post-processes and woven or knitted fabric products. As a solution to the above-mentioned drawbacks, Japanese Patent Application Laid-Open No. 1973-
Publication No. 22744 discloses a method in which a strong tension is intermittently applied to a crimped yarn, the yarn is heated at the same time, and the heated portion is heat-set in a taut state to alternately develop crimped and non-crimped portions. Proposed. This method heat-treats the yarn intermittently by reciprocating the heater, so when forming various patterns, especially patterns with short heating sections, there are restrictions on the shape of the heater, and it is necessary to shorten the heater. . However, in order to provide a sufficient heat-receiving effect with a short heater, it is necessary to increase the heater temperature, which tends to damage the yarn.If the heater temperature is lowered to avoid damage, the heat-receiving effect becomes poor and the yarn is heated. There is a drawback that the difference in turning torque between the heating section and the non-heating section cannot be clearly determined. In addition, in the method in which the yarn is brought into intermittent contact with the heater, only one side of the yarn is heated, so there is a problem that differences in heat reception tend to occur on both sides of the heating section, and uneven turning torque is formed within the heating section. . Furthermore, since the heater is an open system exposed to the outside air, temperature control is difficult and a large amount of heat is released to the outside, which is economically disadvantageous. moreover,
The above method applies strong tension intermittently, so
The heat treated part becomes like raw silk with no turning torque.
In addition, in the non-heat-treated part, the tension is released after being under strong tension, and the turning torque value of the supplied yarn changes depending on the tension state, and the torque value in the high turning torque index part is not stable, resulting in poor quality. Additionally, the raw silk-like portions give the fabric a cold, waxy appearance. The present invention provides a method for producing a specially processed yarn having swirling torque sections and low swirling torque sections made of thermoplastic synthetic fiber multifilament yarn intermittently along the longitudinal direction of the yarn, which eliminates such conventional drawbacks. The purpose is to In order to achieve this object, the present invention consists of the following configuration. That is, water or an aqueous liquid is intermittently applied along the longitudinal direction of a thermoplastic synthetic fiber yarn having a turning torque by an appropriate method, and then the yarn portion (hereinafter referred to as The thread part (A) may be simply referred to as the thread part (A)) remains as a turning torque part with a turning torque index of 50T/M or more, and the other thread parts (hereinafter simply referred to as the thread part (B) )) is heat treated without applying tension to the width so that the swing torque index is reduced to 70% or less of that of the swing torque section, resulting in a low swing torque section. It is. Here, the turning torque index (T/
M) is usually determined by using a turning torque index measuring device as described below. FIG. 2 is a schematic diagram of such a turning torque index measuring device, in which (Y) indicates the yarn to be measured;
11 is the thread fixing screw, 12, 13, 14, 15
Both pins have a diameter of 4 mm and have a matte finish, and the distance between pins 13 and 14 is 3 mm. Also, (W ₁ ) is the initial load applied to one end of the yarn, and W ₂ is the load applied to pins 13 and 1.
The load applied to the yarn between W 4 and P is the hooking point (yarn turning point) of the load W ₂ . The turning torque index is measured as follows. Unwind the yarn from the winding cage in a yarn state (no tension, no twist), and while maintaining the yarn state, apply an initial load W of 1/30 g/d to one end of the yarn. ₁ , and satin pins 12, 13, 1
Pass the thread through 4 and 15, then apply the same 1/30g/d
Hook the load W ₂ on the thread between the satin pins 13 and 14 to set the required sample length (lcm), fix the other end of the thread with the thread fixing screw 11, and reduce the load.
Grip W ₂ with your hand. After setting the yarn in this way, when you release your hand from the load _W2 , the yarn (Y) rotates in the S or Z direction together with the load _W2 , and eventually both come to rest. Find the number of double yarn twists of 13→P→14. Repeat this operation 20 times for each sample (n = 20),
From the average value (Tm) and the sample length (l.cm), determine the turning torque index (T/M) using the following formula. Turning torque index (T/M) = Tm/l x 100 Here, the sample length (lcm) is yarn 13 → P → 14
It is 1/2 of the length under a load of 1/30 g/d, and 5 cm to 100 cm is appropriate. Next, the manufacturing method of the present invention will be explained in detail. The desired yarn of the present invention has a turning torque portion and a low turning torque portion intermittently along the longitudinal direction of the yarn, and a synthetic fiber This is a new yarn that eliminates the uniformity and cold appearance characteristic of multifilament yarns. The following requirements are important factors in order to obtain such yarns industrially and stably. That is, the treatment of the present invention is characterized by heat treatment,
As mentioned above, this heat treatment is carried out in such a way that the effect of the heat treatment does not reach or is extremely small on the yarn portion (A) to which water or aqueous liquid has been attached, thereby reducing the amount of the supplied yarn. The turning torque is made into a turning torque part where the turning torque of the yarn remains, and the other yarn part (B) is heated so that it can be given the effect, and the turning torque is reduced compared to the turning torque part, which is a low turning torque. It is to be carried out as if it were a department. The present inventors have repeatedly studied the heat treatment conditions, and as a result,
It has been experimentally found that it is extremely important to perform the heat treatment as described above in relation to the torque index value of the swing torque section and the torque index difference between the swing torque section and the low swing torque section. Tables 1 and 2 show examples of such experimental results, in which the relationship between torque index and yarn form was investigated by varying the heater temperature and yarn tension during heat treatment. In the experiments shown in Table 1, polyester 150 denier/30 filament two-stage heater false twisted crimped yarn (swivel torque index 59T/M) with relatively low turning torque was used as the supplied yarn, and in the experiments shown in Table 2, Polyester 150 denier/72 filament one-stage heater false twisted crimped yarn with relatively high turning torque as the supplied yarn (turning torque index 196T/M)
Using a gear-type rotating roller, water was applied intermittently to these threads (the length of the thread part (A) was 30~
35cm, yarn part (B) length 90-100cm) Continue heat treatment (non-touch type heater, heat reception time 0.4 seconds,
The yarn speed was 90 m/min), and the heater temperature and tension during the heat treatment were varied.
The supplied yarn used in the experiments shown in Table 1 was supplied using a Mitsubishi Heavy Industries LS-6 false twisting machine, spindle rotation speed 250000 rpm, Z false twisting 2300 T/M, first heater temperature 215°C, 2 heater temperature 220℃,
It was manufactured under the conditions of the first overfeed rate -11% and the second overfeed rate +15%,
The supplied yarn used in the experiments shown in Table 2 was supplied using a Mitsubishi Heavy Industries ST-6 type twisting machine, spindle rotation speed 230000 rpm, S false twisting 2200 T/M, heater temperature 220°C, overfeed rate 0%. It was manufactured under the following conditions. In addition, the tension during heat treatment (the tension immediately after the heater) was adjusted depending on the treatment temperature and the overfeed rate of the treatment area, but in general, as the treatment temperature increases, the overfeed rate decreases. This tension therefore increases. The appearance shapes of the yarns in Tables 1 and 2 are those observed with the naked eye.

【table】

【table】

[Table] As inferred from the results in Tables 1 and 2 above, the present inventors found the following based on these series of experiments. In order to obtain the desired yarn of the present invention, the yarn portion (A) to which water (or aqueous liquid) is attached,
That is, the torque index of the turning torque portion is 50T/M or more, and the torque index of the other yarn portion (B) to which water (or aqueous liquid) is not attached, that is, the low turning torque portion is such that the torque index of the yarn Part (A) 70
% or less.It is essential to perform the heat treatment so that the In order to meet these essential requirements, (a) yarns with large turning torque are preferably
Supply yarn of 55T/M or more (b) Heat treatment temperature as high as possible [200 to 258℃ for regular polyester yarn, 200 to 258℃ for regular nylon 6 yarn
180 to 220°C], and (c) increase the amount of water (or aqueous liquid) attached to the yarn portion (A), preferably so that the yarn portion (A) is still wet immediately after the heat treatment. The amount of adhesion should be as it is in the condition. In the present invention, when the turning torque index of the yarn portion (A) is less than 50T/M, the turning torque index of the yarn portion (B) is 70% or less of that of the yarn portion (A). However, the desired yarn of the present invention cannot be obtained. (Refer to Experiment No. 12 to No. 15 in Table 1) Conversely, even if the turning torque index of the yarn portion (A) is 50T/M or more, the turning torque index of the yarn portion (B) is If it exceeds 70% of that of the thread portion (A), the desired thread of the present invention cannot be obtained. (Experiments No. 1 to No. 5 in Table 1, Experiment No. 5 in Table 2.
As can be seen from the above explanation, water or an aqueous liquid in the present invention is not used for the purpose of reducing or eliminating the turning torque of the supplied yarn. It is used for the purpose of maintaining turning torque. That is, in the method of the present invention, the yarn portion to which water or an aqueous liquid is attached is made to be a turning torque portion, and the other yarn portions are made to be a low turning torque portion. Therefore, the aqueous liquid used in the present invention must not have the effect of substantially reducing or eliminating the swirling torque on the supplied yarn by itself. In this respect, it is completely different from the intention of the prior art in this field, and the turning torque is an effect exerted by the action of the aqueous liquid or the evaporation of water, solvent, etc. from the aqueous liquid system, and the turning torque is Liquids that are clearly lower than those in the yarn portion (for example, the above-mentioned Japanese Patent Publication No. 39-19096 and 39-1909)
Liquids such as those disclosed in Japanese Patent No. 26161) are not applicable to the present invention. The aqueous liquid referred to in the present invention preferably contains at least 50% by weight of water, and typical examples of substances other than water include surfactants, oils and fats, etc. Any aqueous liquid may be used as long as it does not have the effect of substantially reducing or eliminating the swirling torque of the supplied yarn. In the present invention, it is necessary to apply the water or aqueous liquid to the supplied yarn intermittently. Therefore, any method that allows for intermittent application may be used, for example, by applying water or aqueous liquid to the roller surface. It can be applied by means of a gear-type rotating roller provided with stripes or the like. Note that the method of the present invention may be applied to a yarn having a turning torque that has been previously subjected to false twisting and crimp processing, etc., or it may be carried out continuously with the process of processing a yarn having a turning torque. It's okay. FIG. 1 is a schematic diagram showing an example of an apparatus for carrying out the method of the present invention, in which false twist crimp processing (swivel torque processing) and the processing of the present invention are performed continuously. In FIG. 1, raw yarn (for example, ordinary drawn yarn) 1 to be fed to the false twist crimp process is fed to a feed roller 2.
After that, it is heated by the first heater 3, and
The yarn is false-twisted by a false-twisting spindle 4 and processed into a crimped yarn having a turning torque. This crimped yarn passes through a first delivery roller 5, and an adhesion device 6 applies water or an aqueous liquid intermittently along its longitudinal direction, and a second heater 7 (heating heater)
Heat treatment is performed to form a turning torque part and a low turning torque part in the longitudinal direction, and the cheese is rolled up into a rolled cheese 10 by a winding roller 9 via a second delivery roller 8. In the illustrated example, the adhesion device 6 is composed of a gear-type rotating roller in which a plurality of protrusions are arranged intermittently on the roller surface, and a bath of water or an aqueous liquid. It attaches to the yarn. In the method of the present invention, since the above-mentioned method is adopted, unlike the conventional example, when the obtained yarn has a part where the strength is extremely low, the yarn breaks due to this, or when the fabric is made into a woven or knitted fabric. No strength deterioration occurs. Another advantage is that there is no trouble caused by residual processing agents such as solubilizers and swelling agents, which is the case with conventional methods. Furthermore, the present invention involves intermittently applying an aqueous liquid to a thermoplastic fiber yarn having a turning torque, and then heat-treating the yarn, and continuously heat-treating the processed yarn to which an aqueous liquid has been intermittently applied. Therefore, unlike in the case of intermittent heating, there are no restrictions on the shape of the heater. Therefore, since heating can be performed in a closed system such as the second heater of the false twister, it is possible to uniformly heat the non-liquid-attached portion and apply a turning torque difference according to a set pattern. Furthermore, since the heat treatment can be performed under conditions comparable to the normal two-heater false twisting conditions, there is no damage to the yarn, and furthermore, there is no reduction in thermal efficiency due to heat release. In addition, since the present invention performs heat treatment without extensive tension, there is no variation in the quality of the high turning torque section due to tension fluctuations, and on the other hand, even the low turning torque section maintains a certain degree of turning performance. The degree of unevenness and bulge of the grain changes due to swirling properties, giving the woven or knitted fabric the appearance of natural thread irregularities, and there is no problem of imparting a cold appearance or waxy texture to the woven or knitted fabric. Hereinafter, the present invention will be specifically explained with reference to Examples. Example A normally drawn filament yarn of nylon 6,70 denier 24 was loaded into the apparatus shown in Figure 1, and subjected to false twist crimp processing (swivel torque processing) under the conditions shown in Table 3.
The method of the invention was carried out continuously. Table 4 shows the properties of the obtained yarn and the properties of woven and knitted fabrics made of this yarn alone. As shown in Fig. 3, the obtained yarn has turning torque portions a and low turning torque portions b alternately along the longitudinal direction of the yarn, and the obtained woven or knitted fabric has many uneven yarns appearing on the surface. , which was completely different from conventional general synthetic fiber knitted fabrics.

【table】

【table】

【table】 [Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of an apparatus for implementing the present invention, Fig. 3 is an enlarged schematic diagram showing an example of a yarn obtained by the present invention, and Fig. 2 is a measurement of the turning torque index of the present invention. 1 is a schematic diagram showing an example of a device for 1... Supply yarn, 2... Feed roller, 3
...First heater, 4...False twisting spindle, 5...
...First delivery roller, 6...Adhesion device, 7...
...Second heater, 8...Second delivery roller,
9... Rolling roller, 10... Rolling cheese, 11
...Thread fixing screws, 12, 13, 14, 15...
Pin, W ₁ ... initial load, W ₂ ... load, P ... load hooking point, a ... turning torque section, b ... low turning torque section.

Claims (1)

[Claims] 1. Water or a liquid containing water as a main component is intermittently applied along the longitudinal direction of a thermoplastic synthetic fiber yarn having swirling torque, and then The yarn portion to which the liquid is attached remains as a turning torque portion with a turning torque index of 50T/M or more, and the other yarn portions have a turning torque index of 50 T/M or more. 1. A method for producing specially processed yarn, characterized in that heat treatment is performed without applying tension to the width of the yarn so as to have a low turning torque of 70% or less. 2. The method for producing a special processed yarn according to claim 1, wherein the thermoplastic synthetic fiber yarn having a turning torque is a yarn having a turning torque index of 55 T/M or more. 3. The method for producing specially processed yarn according to claim 1 or 2, wherein the liquid whose main component is water is a liquid containing at least 50% by weight of water.