JPS6111335B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to a group of thermoplastic multi-filament yarns, each of which is irregularly entangled and intertwined at appropriate intervals along the longitudinal direction of the yarn, and in which the surface layer portion of the yarn is A part or most of the bent overhangs of the loops or curls are cut to form fluff, and the fineness of these fluffs is at least 5% larger than the fineness of the same yarn components that make up the strata. The present invention relates to a special bulky fluffy yarn and a method for producing the same. Traditionally, multifilament yarns are subjected to fluid agitation to create entanglement or entanglement between single fibers, converging the yarns, and forming loops or curls in the single fibers, resulting in a unique spun-like texture. Methods for manufacturing yarn (e.g. Japanese Patent Publication No. 34-8969)
(see Publication No.) is widely known. In this type of method, the structure of the yarn to be processed, such as the denier of the entire yarn or the denier of a single yarn, the number of filaments, the fluid disturbance conditions,
Furthermore, the performance of the yarn or the feel of the woven or knitted fabric can be changed over a considerable range by adjusting the overfeed rate during processing. However, the width of these textures is basically due to the loops formed in the yarn.
Alternatively, it is caused by a bulking phenomenon such as curling, and the overall texture obtained by this is hard, dry, and paper-like. This tendency did not fundamentally change even if various conditions for producing this type of yarn, such as the above-mentioned filament structure, disturbance conditions, and overfeed rate, were varied widely. For this reason, although the yarn produced by this method has a long history since its development, it has only been used in a limited range of textiles. On the other hand, in order to overcome this drawback, it is possible to simultaneously use the fluid agitation effect by the above-mentioned method and cut a part or all of the loop, etc. by using a rough friction body to cut the curved protrusion of the obtained loop or curl. A method of false twisting and crimping of fluffy yarn has been proposed. This added a new effect of fluff to the traditional texture of loops or curls, and it certainly had the effect of making the texture softer and closer to spun-like, but it is still not widely available in the market. The reality is that this is not the case. Based on this background, the present inventors have made earnest efforts to solve the problem, and have determined that the problem with the latter method is due to the fact that the fluff obtained after much effort has crimps. It is true that fluff gives a spun-like texture, but we have come to the conclusion that crimped fluff is too soft and when touched, it clings to the skin and gives an unpleasant feeling. In this case, fluff is of course necessary, but it is the short and large number of fluffs that do not have crimps that provide the so-called spun-like yarn that the market is looking for, and at the same time, winding such as false twisting to give bulkiness or stretchability. It turned out that shrinking was actually unnecessary. As a result of these studies and analyses, the inventors of the present invention have arrived at a novel processed yarn having fluff with the following characteristics and a method for producing the same. That is, according to the present invention, the fibers are made of single fibers (fibers) with substantially no unevenness in thickness in the longitudinal direction, and the actual number of twists is 10×10 ³ /De≦T (twice/M)≦5×10 ^Four /
A flat yarn of drawn yarn having a twist number of De (De is the denier of the yarn) is subjected to a fluid bulk entangling treatment to randomly generate numerous loops, curls, and bent overhangs as well as a substantial number of entangled portions. After that, by rubbing the yarn with a rough friction body, part or most of the fibers that mainly constitute loops, curls, and bent parts on the yarn surface are cut, and in addition to the loops, fluff is further formed. After that, the fibers are allowed to pass through a heat treatment region to heat-shrink the yarns, especially the fluffy portions, thereby increasing the fineness of the filaments in the fluffy portions by at least 5% more than that in the strata. We succeeded in obtaining a bulky fluffy yarn with a specific shape. In the present invention, a drawn yarn that is stable in terms of strength and elongation, that is, a drawn yarn consisting of a single fiber (fiber) with substantially no uneven thickness in the longitudinal direction, is used as the raw yarn. It is particularly effective when the filament is thin, with a single fiber denier of about 0.1 to 3 denier, giving a supple texture despite its thinness, and the fluff or a small number of loops with a slightly thicker denier provides comfortable repulsion. It gives you a good feeling. In order to shrink the fluff part or loop part by at least 5%, especially in the case of polyester yarn, it is necessary to
A heat treatment device used in a normal false twisting machine having a temperature range of .degree. Also, the tension of the yarn when passing through the heat treatment equipment is 0~
It is possible to select from a fairly wide range, such as 1 g/de, and this selection is made mainly depending on the desired bulkiness of the yarn. That is, when it is desired to increase the bulkiness, the tension is set low, and when the bulkiness is not so high and it is desired to shrink only the fluff or loops, the tension is set high. However, in either case, the tension of the yarn does not directly affect the shrinkage of the fluff or loop. This is because the tension of the yarn, that is, the tension in the yarn axis direction, does not restrain the loops or fuzz that originally exist in the direction perpendicular to the yarn axis. Furthermore, in the present invention, in order to obtain an even larger number of loops or fluffs, especially a large number of short and uniform fluffs, the yarn supplied in advance is given the following first twist. 10×10 ³ /De≦T≦5×10 ⁴ /De (However, De is the denier of the yarn to be supplied; the above formula is applied to each individual yarn even when it is supplied from multiple yarns. ) This shows that if a twisted yarn is subjected to a bulking treatment using a fluid, it exhibits extremely good loop formation properties compared to a non-twisted yarn.
This is because a large number of fine and uniform loops can be obtained depending on the number of twists. Moreover, regarding the fluff obtained by cutting these loops,
Compared to the case where no twisting is applied, it is possible to obtain shorter, more uniform, and more fluff than when the yarn is not twisted. Next, the present invention will be explained according to the drawings. Fig. 1 shows a basic embodiment of the present invention, in which 1 is a raw yarn to be supplied, 2 is a guide, and 3 is a supply roller system. 4 is a compressed air treatment nozzle for providing a disturbance effect, and 5 is a roller system necessary to regulate the overfeed rate when applying the compressed air treatment. During the compressed air treatment between the roller systems 3 and 5, overfeed of the yarn is regulated.
Reference numeral 6 designates a rough surface friction body for cutting bent protrusions such as loops or curls to generate fuzz. 7 serves as a supply roller system for the heat treatment device 8, and at the same time serves to regulate the tension of the yarn when passing through the rough friction body. 9 is a final delivery roller system, and at the same time, together with the roller system 7, regulates the tension of the yarn in the heat treatment device. 1
0 is the winding section. Further, FIG. 2 shows an example in which two supply yarns 1 and 1' are used as supply yarns. Furthermore, FIG. 3 shows that the yarn 1' is supplied to the compressed air treatment device 4 at a feeding speed different from that of 1.
This method is recommended when it is necessary to obtain a bulkier effect during treatment. FIG. 4 shows the form of a bulky yarn 12 having only loops or curls 11 that have been simply subjected to air pressure treatment, as seen in the past, and FIG. FIG. 2 is an external view of a fluff crimped yarn 14 in which the fluff itself has a crimped form because it has been processed. On the other hand, FIG. 6 shows an external view of the special bulky fluffy yarn 15 obtained by cutting the loops of the bulky yarn shown in FIG. Therefore, there is no crimp in the fluff 16, and the fineness of the yarn in the fluff and loop portions is slightly thicker than that in the strata, but there is almost no improvement in the uniformity and density of the fluff. do not have. On the other hand, FIG. 7 shows that according to the present invention, the yarn is supplied in advance with 10×10 ³ /De≦T times/M≦5×10 ⁴ /
This is a model diagram of the appearance of the fluff yarn obtained when the twist determined within the range of De is applied, and the fluff 17 is extremely short, uniform, numerous, and has no crimps (also, this fluff is Since the raw yarn is a drawn yarn, the yarn 18 does not become brittle. In fact, the yarn obtained by this method has been hailed as the highest quality yarn suitable for a variety of weaving and knitting applications, having a moderate bulkiness, an extremely soft touch, and excellent handling properties. Next, embodiments of the present invention will be described in detail. Example 1 Bulking was performed using the process shown in FIG. 1 under the following conditions.

[Table] The fluff length distribution of the processed yarn obtained by the above processing method was as follows. Fluff length ratio 1 mm or less - 5% 1 to 5 mm - 94% 5 mm or more - 1% Additionally, as a result of microscopic measurements, the length of the fluff is 10% in the length direction.
% shrinkage, and the fineness of this shrinkage area increased by 5.1%. Fabrics made from this yarn are spun-like because the fluffy portions that have become thicker due to heat shrinkage have the effect of creating a smooth and soft feel. Example 2 Bulking was performed using the process shown in FIG. 2 under the following conditions.

[Table] 〓〓〓〓

[Table] The fluff length distribution of the processed yarn obtained by the above processing method was as follows. Fluff length ratio 1 mm or less 5% 1 to 5 mm 94% 5 mm or more 1% As a result of microscopic measurements, the fluff contracted by 10% in the length direction, and the thickness of this contracted portion increased by about 9%. The plain woven fabric made of 100% of this yarn has a smooth and soft spun-like texture due to the effect of heat-shrinked fluff.

[Brief explanation of the drawing]

FIG. 1 shows a basic embodiment of the present invention, and FIGS. 2 and 3 show other embodiments. Fig. 4 is an external view of a conventional bulky yarn consisting only of loops and slack, Fig. 5 is an external view of a conventional bulky crimped fluff yarn consisting of fluff with crimps, Fig. 6 is a comparison diagram with the present invention, and Fig. 7 1 is an external view of a bulky fluffy yarn according to the present invention. 〓〓〓〓

Claims (1)

[Scope of Claims] 1. Consisting of single fibers (fibers) with substantially no unevenness in thickness in the longitudinal direction, and having a substantial number of first twists of 10×
10 ³ /De≦T (turns/M)≦5×10 ⁴ /De (where De is the denier of the yarn) The filaments are irregularly entangled, and some or most of the loops or curved protrusions of the curls on the surface layer of the yarn are cut to form fluff, and the fineness of these fluff areas is higher than that of the stratum layer. A special bulky fluffy yarn characterized by having a fineness that is at least 5% larger than the fineness of the same yarn components. 2 Consisting of single fibers (fibers) with substantially no unevenness in thickness in the longitudinal direction, and with a substantial number of first twists of 10×
10 ³ /De≦T (turns/M)≦5×10 ⁴ /De (where De is the denier of the yarn) A drawn yarn flat yarn is subjected to fluid bulk entangling treatment to form a large number of loops and curls. The fibers mainly constitute loops, curls, and bent overhangs on the yarn surface by randomly generating substantial tangled parts together with bent overhangs and then abrading the yarn with a rough surface friction body. A method for producing a special bulky fluffed yarn, which comprises cutting a part or most of the yarn to form loops and further forming fluff, and then passing the yarn through a heat treatment region to heat-shrink the yarn, particularly the fluffed portion.