JPS6211093B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a method for producing a novel spun yarn-like processed yarn having loops and fluff. Conventionally, there have been a variety of proposals for developing filament yarns with fluff, loops, crimps, etc. that are oriented toward spun-like properties, and these have also been put to practical use. In particular, many methods have been introduced that use fluids such as air to create fuzz and loops at the same time as entanglement. However, with these methods, it is currently not possible to obtain a spun yarn having the cohesiveness and bulk of a spun yarn formed by real twisting. In other words, most of the yarns generate fluff and loops, and at the same time, they additionally intertwine and bundle the entire yarn.If appearance is emphasized, the entanglement becomes insufficient and "unraveling" occurs under the tension during the knitting process. Easy to cause problems. In addition, with intertwined and bundled yarns, the entire yarn tends to flatten due to the force in the lateral direction of the yarn, and the yarn shape after knitting and weaving loses its roundness. Effect on bulkiness,
The actual situation is that it is unsuitable for the high-end clothing field. As a result of repeated research into the simple production of spunlike yarn with high cohesiveness and bulk, the present inventors found that
It has been discovered that by combining the entangled focusing effect caused by the disturbed fluid treatment and the false twist focusing effect caused by the untwisted air false twisting process, a highly focused state and bulkiness that cannot be achieved by each effect alone can be obtained, and the present invention has been made. has been reached. That is, the present invention creates loops and entangled bundles by aligning acetate filament yarns and polyester filament yarns or polyamide filament yarns and treating them with turbulent fluid under overfeed, and then in the same overfeed area, air temporary This is a method for producing a specially processed yarn, characterized in that the loops are miniaturized and the bundle is strengthened by untwisting and false twisting using a twisting method. As the acetate filament yarn used in the present invention, either diacetate yarn with an acetylation degree of 53 to 57% or triacetate yarn with an acetylation degree of 60 to 62% can be used. Triacetate yarns are preferred from the standpoint of fastness. FIG. 1a is a side view showing an example of the apparatus used in carrying out the present invention. Then, the turbulent fluid treatment device 4 imparts loops and entanglements to the drawn yarn. At this time, it is important to perform a relatively mild fluid treatment on the yarn to the extent that it does not cause single fiber breakage, and this also prevents the occurrence of floating single fibers, so-called fly, during processing. effective. Therefore, the yarn binding in this area is insufficient. Subsequently, in the same excess supply area [between the feed roll 3 and take-up roll 8], the false twisting device 7
Temporary combustion is performed using the set heater 6, but
In this case, it is essential to perform the untwisted false twisting process. In other words, it goes without saying that the purpose of this false twisting process is to give the yarn a bulky feel, but it is also to make the rough loops created in the previous fluid treatment fine and dense, and to prevent insufficient focusing. The aim is to improve That is, by subjecting the disturbed fluid treatment thread to pre-combustion processing, the loop changes into a finer one, and is heat-set at the same time. In addition, by making the false twisting process into an ununtwisted false twisting process, the yarn after passing through the false twisting device 7 has interlacing and is in the form of an S, Z alternating twist as a whole. Compared to conventional heat-sealed continuous untwisted yarns, it is possible to obtain S and Z intertwisted bundled yarns that are bulky and have fluff and loops, and also have ease of passing through subsequent processes without problems such as opening. does not occur. Note that some of the fine loops formed during the false twisting process break off into single fibers and become fluffy, but most of them remain intact, and the yarn as a whole is a processed yarn that mainly consists of fine loops. . FIG. 2 is a side view showing the structure of the yarn formed by the method of the present invention, and a shows the yarn after being treated with the disturbed fluid, with large loops and insufficient entanglement. . b indicates the yarn in the twisting area,
The loops are in a densified state due to strong twisting, and c shows the shape of the yarn after passing through the false twisting device. Specifically, a structure has been achieved that takes into consideration convergence by interlacing convergence and convergence by alternating S and Z twists. The disturbed fluid treatment device 4 used in the present invention is required to have the function of providing loops and connections, but as described above, both loops and entanglements require mild processing conditions. 4
is not particularly limited, and the purpose can be achieved with a relatively simple device. Furthermore, when performing untwisted false twisting, it is conventionally carried out under processing conditions such as low processing tension, high number of twists, and high processing temperature, but in the present invention, the texture of the formed yarn is In order to make the material soft and to use low-strength fibers such as acetate fibers, it is necessary to set conditions with the main requirement of setting a low processing tension. As the false twisting device in the present invention, it is extremely effective to use an air false twisting method, which not only satisfies the above-mentioned requirements but also makes it possible to improve processing stability and simplify the process. To be more specific, in the currently widely used spindle pre-combustion method, the yarn is usually wound around a spinner peg and run, so the frictional resistance at the spindle is large and the tension after passing through the spindle is 2 times the tension before the spindle. ~ 3 times as much yarn, and at the same time, yarns with significant unevenness such as loop yarns get looped in when passing through the spinner peg, reducing processing stability. However, when using the air temporary twisting method, it is necessary to wrap the yarn around the spinner peg. Processing stability is good because there is no friction resistance, and since there is no equivalent to a spinner peg as a friction resistance body, there is little tension difference before and after the twisted body, and as a result, a wide working range (condition setting range) is ensured. It is a unit suitable for performing final untwisting processing, and a more important feature is that the air false twisting method is suitable for processing with lower tension than the spindle false twisting method, so it is the same as turbulent fluid processing. It is possible to perform false twisting in the excess supply area. In other words, in the turbulent fluid processing area, excess supply is carried out, so the tension of the running yarn is very low, and in order to carry out false twisting in the same area continuously, even under low tension. It must be able to be processed stably, and with normal spindle false twisting, yarn breakage occurs due to increased ballooning between the heater outlet and the false twisting device, whereas air false twisting avoids yarn breakage. This enables stable processing. Figures b and c in Fig. 1 are side views showing other examples of the apparatus used to carry out the present invention, and b is a side view showing another example of the apparatus used for carrying out the present invention, and b is a two-heater type false twisting machine to eliminate the residual torque of the yarn processed by this method. An application example is shown, and c is an example in which a yarn twisting machine is applied as a specific example of eliminating residual torque by additional twisting. As explained above, the method of the present invention is characterized in that after providing coarse loops and coarse entanglement, it provides dense loops and high convergence in the same area.
This greatly simplifies the device and has the special effect of ensuring a wide working range. In addition, when acetate fibers and polyester fibers are aligned and processed according to the present invention, the polyester in the loops generated by the turbulent fluid treatment shrinks, and although it looks like a wall twist at first glance, the acetate is pulled into the inside of the yarn and becomes a core. The acetate fibers and polyester are intertwined in the periphery, and the acetate fibers present a looped or fluffed yarn structure in the peripheral area, so the acetate exhibits good coloring properties and is rich in luster, as well as the polyester yarn. By taking advantage of its strong characteristics, favorable spun-like yarn can be obtained. The above-mentioned characteristics of the processed yarn obtained by the present invention exhibit a favorable appearance and feel for outerwear, especially women's outerwear, in fabrics such as highly twisted fabrics, jerseys, and tricots. , its significance and value as a fashion material is extremely great. Hereinafter, the present invention will be explained in more detail with reference to Examples. Example 1 Using the apparatus shown in Figure 1a, 120d/33f triacetate and 30d/12f polyester threads were drawn and provided, and the special fabric of the present invention was prepared under various conditions shown in Table 1. Performed twisting process.

[Table] As a result, when air false twisting and disturbed fluid treatment are performed in the same excess supply area, the overfeed rate (OF rate) is +10 to +25%, the disturbed fluid air pressure is up to 3Kg/ ^cm3 , and the false twisting Air pressure is 0.2~0.8Kg/
It was confirmed that machining is possible over a wide range of up to ^cm2 , and the machining tension (T ₁ /T ₂ ) before and after temporary combustion is (1
~2) Stable processing was possible at an extremely low level of g/(1.5 to 2.5) g. In addition, regarding the obtained yarn properties, it is a processed yarn that mainly consists of dense loops and has good cohesiveness.
In addition, the OF rate is higher due to less occurrence of fries during machining.
20%, a disturbed fluid air pressure of 2.0 Kg/cm ² , and a false twisting air pressure of 0.5 Kg/cm ³ produced good results, and the main yarn properties are shown in Table 2. When this yarn was knitted with a jersey texture using an 18G circular knitting machine, a unique fabric was obtained that had a spun yarn-like texture due to the fluff and loops, and a crispness and drapability due to the alternating twist. Ta.

[Table] Example 2 Processing of 4 types was carried out under the following conditions,
It was knitted with 22G jersey and made into a jersey product. Processing conditions (1) Processing equipment: Figure 1b (2) Processing conditions: Yarn speed: 100m/min, OF rate: +20/-0.3/-0.7% Heater temperature: 200/210℃ Disturbance treatment air pressure: 2.0Kg /cm ³ False twisting air pressure: 0.45Kg/cm ³ Processed products (1) Triacetate 120d×55f×Polyester 30d/16f (2) 〃 120d/33f× 〃 (3) 〃 60d/30f× 〃 20d/12f *( However, for variety (3), two wires were lined up at the time of formation) The results are shown in Table 3. In terms of product properties, all fabrics have a voluminous feel as a whole, and give the dry feel and firm hand feeling characteristic of triacetate.

【table】 [Brief explanation of the drawing]

Figures 1a, b, and c are side views showing various examples of devices used to carry out the present invention, and Figures 2a, b, and c are views of the yarn at each stage of the specially processed yarn formed by the present invention. It is a side view, and in FIG. 1 and FIG. 2,
1 and 2 are supply yarns, 3 is a feed roll, 4 is a disturbed fluid treatment device, 6 is a heater, 7 is a false twisting device, 8 is a take-up roll, 9 is a package, 10 is a second heater, and 11 is a second take-off roll. be.

Claims (1)

[Claims] 1 Acetate filament yarns and polyester filament yarns or polyamide filament yarns are brought together and treated with turbulent fluid under excess feeding to produce loops and entangled bundles, and then unresolved by air false twisting in the same excess feeding area. A method for producing a specially processed yarn, characterized in that the loops are miniaturized and the bundle is strengthened by twisting and false twisting.