JPS626015B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an animal hair-like fluff yarn and a method for producing the same. Conventionally, methods for fluffing multifilament yarns have been proposed, such as simple elongation cutting or using a cutting tool such as a scraper or a sharp knife. (Unexamined Japanese Patent Publication No. 116741, No. 6847)
(Japanese Patent Laid-Open No. 50-5652, etc.) Recently, in conjunction with the diversification of consumer tastes, much research has been carried out on differentiating multifilament yarns and making them spunlike. However, conventional fluffy yarns are simply cut filaments and have a rough and hard texture, and cannot produce the soft texture of animal hair such as lamb, cashmere, and wool. Furthermore, functionality problems such as pilling have not yet been sufficiently resolved. Of course, although loop yarns produced by fluid treatment can be differentiated as multifilament yarns, they are far from spun-like yarns, especially animal hair spun yarns. As a result of evaluating products made from animal hair and spun-like products, we learned that the texture of products made from animal hair, especially the softness of the touch, is extremely influenced by the ends of the constituent fibers, that is, the animal fluff. In view of the above-mentioned points, an object of the present invention is to provide a fluffy yarn made of synthetic fiber multifilament yarn, which has an extremely soft touch and a good animal hair-like feel compared to conventional fluffy yarns. It is an object of the present invention to provide a novel animal hair-like fluff yarn that also has excellent anti-pilling properties and can be used in a wide variety of applications, and a method for producing the same. The present invention has the following configuration. That is, the present invention provides a fuzzy yarn made of thermoplastic synthetic fiber multifilament yarn, which is a yarn in which at least 20% or more of the total number of fluffs is animal hair-like fluff having needle-shaped fluff ends, and It is an animal hair-like fluff yarn characterized by the constituent filaments intertwined with each other. When supplying the multi-filament yarns, heat treatment is performed so that the elongation increase rate of the part that becomes fluff is at least 20% by running the multi-filament yarn in contact for a time that does not allow the temperature of the heating element to be uniformly transmitted to all the multifilament yarns, After partially imparting a weak point that can be stretched and cut, the weak point is continuously or separately supplied to a fluid entangling device, and the weak point is stretched and cut with fluid to fluff and simultaneously impart entanglement. The present invention relates to a method for producing animal hair-like fluff yarn. Next, the present invention will be explained in more detail with reference to the drawings. FIG. 1 is a schematic diagram showing an example of the animal hair-like fluff yarn of the present invention. 1 is a tapered needle-like animal hair-like fluff yarn, and 2 is a convergence part due to interlacing. 3 is a loop caused by confounding. FIG. 2 is an enlarged schematic diagram of the fluff tip of the animal hair-like fluff yarn of the present invention, where D ₀ is the yarn diameter of the portion that is not fluffed, and D is the yarn diameter of the portion L/10 from the fluff tip. be. L is the length of the tip of the fluff, which is animal hair-like fluff. FIG. 3 is a schematic diagram showing an example of the method for producing animal hair-like fluff yarn of the present invention. In FIG. 3, the thermoplastic synthetic fiber multifilament yarn 4 passes from the tension compensator 5 to the feed roller 6 and on the heating element 7, the multifilament yarn is unevenly distributed between the filaments of the multifilament yarn and in the filament length direction, and is made into a single yarn. It is heat-treated so that the partial elongation increase rate is 20% or more, and a weak point that can be stretched and cut is provided by a fluid entangling device in a later step. The feed rate during this heat treatment is controlled by the feed roller 6 and the first delivery roll 8. The heat-treated multifilament yarn continues to the first delivery roller 8.
The filaments pass through the fluid entangling device 9, where the weak points imparted by the non-uniform heat treatment are stretched and cut, and the filaments are entangled. The relaxation rate during this fluid entanglement process is controlled by the first delivery roller 8 and the second delivery roller 10. The fluid-entangled multifilament yarn passes through the second delivery roller 10 and then passes through the winder 1.
It is rolled up to 1. In the present invention, animal hair-like fluff is defined as D/D ₀ <0.5 and L/D ₀ >2 at least at the tip of the fluff.
A thread that satisfies both of the above. L/D ₀ <1.5, that is, ordinary fluffy yarn will not give an animal hair-like texture at all, and at least L/D ₀ >2 is required, preferably L/D ₀ >4. . In order to investigate the ratio of animal hair-like fluff and the texture effect, the fluff yarn according to the present invention was used in combination with a forced fluffing method using a rotary abrasion device to change the animal hair-like fluff ratio. evaluated. As a result, the effect of animal hair-like fluff cannot be seen unless the ratio of animal hair-like fluff to the total number of fluffs is at least 20%. It has been found that the content is preferably 30% or more, and in order to obtain a more preferable hand, it is 50% or more. The multifilament yarn used in the present invention may be any thermoplastic multifilament yarn, but multifilament yarns made of polyester fibers, polyamide fibers, and polyacrylic fibers are particularly preferred. Moreover, not only drawn yarn but also highly oriented undrawn yarn, so-called POY, may be used. In addition, by aligning thermoplastic multifilament yarns of the same type, different types, or non-thermoplastic multifilament yarns, or supplying them with a water supply difference, one or both of these thermoplastic multifilament yarns can be fluffed to create animal hair-like fluff. It can be done. In addition, yarns of different fineness, hygroscopicity,
It is possible to use different dyed yarns, spun-dyed yarns, and the like. In addition, in the manufacturing process, it is also possible to combine other processing, such as temporary twisting processing for imparting bulk and crimp, and turbulent flow type fluid processing. The combustion treatment in the heating body is an important point for producing the animal hair-like fluff yarn of the present invention, and the type of yarn used and the shape of the heating body, such as pin type, club type,
The decision is made taking into consideration the plate type, temperature, processing speed, overfeed rate during heat treatment, etc., but the more important thing is the uneven and rapid difference in heat reception between the filament systems and in the longitudinal direction of the filament, that is, the fluid entanglement process. The point is to provide a weak point that can be stretched and cut at the same time, and contact with the heating body is an essential condition. The higher the temperature of the heating element, the more likely it is to form animal hair-like fuzz, but it must be selected in consideration of the strength retention rate of the multifilament yarn and manufacturing stability. Specifically, it can be said that the maximum heat-receiving temperature of the substantial heat-receiving portion of the thermoplastic multifilament yarn used is preferably near the softening point of the fiber. Setting the heating element shape, temperature, and overfeed rate during heat treatment are important for controlling the number of fuzz, as well as for creating the bulk height and texture when fabric is made, and the heathered effect when dyeing. In addition, in order to produce animal hair-like fluff yarn, heat treatment is performed so that the partial elongation increase rate of the single yarn, which becomes fluff, is at least 20% at the weak point where it is stretched and cut by fluid entanglement treatment. From the results of various experiments in which the elongation increase rate was changed, it was found that even if the elongation increase rate is less than 20%, the fluff can be fluffed under fluid entanglement treatment conditions. It was found that it did not become fluffy yarn. In addition, more preferably, the elongation increase rate needs to be 30% or more. Here, the elongation increase rate refers to the rate of increase in elongation when the yarn is run in contact with a heating element in order to form a weak point that can be stretched and cut by fluid entanglement treatment, and the single yarn before fluid entanglement treatment is tested using a universal tensile tester. ("Instron") was used to measure the elongation, and the elongation was calculated using the following formula. Single yarn sample length: 20 mm Tensile speed: 20 mm/min Elongation increase rate: S/S ₀ × 100 (%) Here, the number of single yarns to be measured is 100 (strands), and S is 100
(book) 10 in descending order of elongation of measurement data.
This is the average value of (books). S ₀ is 10 in order from lowest to lowest elongation.
This is the average value of (books). The thus obtained non-uniform heat-treated multifilament yarn having weak points that can be stretched and cut can be made into needle-shaped fibers by being subjected to a fluid entanglement treatment or a separate fluid entanglement treatment following this heat treatment. The animal hair-like fluff yarn of the present invention is completed by producing fluff and interlacing. In addition, the nozzle shape, fluid pressure, relaxation rate during fluid entanglement treatment, whether the fluid is air, steam, or liquid, and whether or not fluid heating is used will affect the number of fuzz and the ratio of animal hair-like fuzz. The decision should be made based on the The fluffy yarn of the present invention does not particularly need to be looped or crimped, but
It doesn't matter if it happens. In addition, in the method for producing animal hair-like fluff yarn of the present invention, it is possible to impart a non-uniform and sudden difference in heat reception by bringing it into contact with a heating body, and to impart a weak point that can be partially stretched and cut. It is an essential condition to create animal hair-like fluff, and the simple asymmetric heat treatment that has been proposed in the past is based on the manufacturing conditions - shape of the heating element, contact time, temperature, etc., effects, purpose - mere bulkiness, crimping, It is obvious that they differ in terms of improvement in entangling properties (loop form, loop stability, etc.) by adding a difference in shrinkage rate, etc., and in combination with entangling treatment. Specifically, it is determined by taking into account yarn type, fineness, number of filaments, heat treatment conditions (heating body shape, contact length, temperature, etc.), manufacturing speed, feed rate, etc., but the partial elongation increase rate of single yarn is In order to achieve at least 20% or more, the yarn is heat-treated in a partially relaxed state to become a heat-receiving weak point, and the single yarn portion with a high elongation increase rate is cut by the elongation action during fluid entanglement treatment. be. However, it goes without saying that in terms of manufacturing conditions, it is not necessarily necessary to perform heat treatment in an overfeed state in order to impart a relaxed state. In addition, the fluid entanglement process does not only create entanglements (loops, interlaces, etc.), but also weakens the yarn and stretches and cuts the parts where the elongation increase rate is high. It is preferable to use a fluid entangling device with a strong action perpendicular to the fiber axis, and to also increase the fluid injection pressure. Of course, conventional interlaced or turbulent type nozzles may be used alone or in combination. Since the fluffy yarn of the present invention is animal hair-like fluffy yarn, it stands out in that it is extremely soft to the touch and animal hair-like compared to conventional fluffy yarns. In addition, there is almost no pilling problem that is associated with fluffy yarns. This is mainly due to the fact that the tip of the fluff is tapered into a needle-like shape, and there is almost no crimp at the tip of the fluff.In other words, the crimp is elongated and disappears during the fluid entangling process, making it difficult to cause pilling. Also,
The fact that fluff does not grow due to entanglement is also considered to be a factor that prevents pilling. Therefore, it can be used not only as a simple spun-like material, but also in a wide range of applications, from underwear to outerwear, depending on the fluff design (number of fluff, fluff length, animal fluff ratio, etc.), yarn design, weaving, and knitting design. . The present invention will be explained in more detail with reference to Examples. Example 1 Polyethylene terephthalate multifilament yarn 75 denier and 72 filament were used to create the third
Manufactured using the process shown in the figure. The processing conditions are as follows. Processing speed (feed roller peripheral speed: 230 (m/min) Heat treatment conditions Heating element: Cylindrical pin (60φ) Pin contact length: 90 (mm) Pin temperature: 235 (℃) Overfeed rate: 12 (%) Fluid entanglement treatment Conditions Nozzle: Nozzle for strong entanglement (prototype) Fluid (air) pressure: 5 (Kg/cm ² ) Relaxation rate: 6 (%) Here, overfeed rate = R - R ₁ /R x 100 Relaxation rate = R ₁ - R ₂ /R ₁ ×100 where R = peripheral speed of feed roller R ₁ = peripheral speed of first delivery roller R ₂ = peripheral speed of second delivery roller The yarn characteristics were as shown in the following table (Table 1).

[Table] *Measurements were made on yarn taken out before fluid entanglement treatment.
However, the animal hair-like fluff ratio was measured as follows. The fluff tips of 100 fluffs were observed under a microscope, and the number of animal-like fluffs to the total number of fluffs was defined as the ratio of animal-like fluffs. The fluffy yarn produced by the above method was machined using a circular knitting machine to produce 28G
It was knitted on both sides in two tiers, and after dyeing and finishing, the texture was evaluated. The texture was wool (merino)-like, and the fabric was extremely spun-like. In addition, it also showed extremely good anti-pilling properties (grades 4 to 5) in a pill test (ICI type pill tester, 10 hours). Example 2 The fluffed yarn was trial-produced under the same conditions as in Example 1 except that the temperature of the heating element was changed by 2 to 5°C and the number of fluffs was reduced. Fluff it so that it becomes (ke/m),
We created a standard with a different animal hair-like fluff ratio, knitted it into a knitted fabric (28G), and then treated it with boiling water to examine its texture. The results were as shown in the following table (Table 2).

[Table] is based on lamb wool tatsuchi.
Example 3 Polyethylene terephthalate highly oriented undrawn yarn (spinning speed 2700 m/min) 150 denier 48 filament (level-2) and nylon 6 drawn yarn 140 denier 48 filament (level-3) were used in the process shown in Figure 3. Manufactured. The manufacturing conditions are shown in Table 3.

【table】

【table】 Table 4 shows the yarn properties obtained above.

[Table] *Measured on yarn taken out before fluid entanglement treatment.
The above-mentioned fluffy yarn was knitted into two tiers on both sides (20G), and after dyeing and finishing, the texture was evaluated. Level-2・
All three exhibited wool-like soft touch. Regarding level 2, good heathering was exhibited by dyeing with non-uniform dyes.

[Brief explanation of the drawing]

FIG. 1 is a side model view of the animal hair-like fluff yarn of the present invention. Moreover, FIG. 2 is an enlarged schematic view of the fluff tip portion. D ₀ is the yarn diameter of the portion that is not fluffy, and D is the yarn diameter of the L/10 portion from the fluff tip of the animal hair-like fluff. FIG. 3 is a schematic diagram showing an example of the method for producing animal hair-like fluff yarn of the present invention. 1: Animal hair-like fuzz, 2: Convergent part due to interlacing,
3: Loops generated by entanglement, 4: Thermoplastic multifilament yarn, 5: Tension compensator, 6: Feed roller, 7: Heating body, 8: First delivery roller, 9: Fluid entanglement processing device, 1
0: Second delivery roller, 11: Winder.

Claims (1)

[Scope of Claims] 1. A fuzzy yarn consisting of thermoplastic synthetic fiber multifilament yarn, which has at least 20% of the total fluff.
The animal hair-like fluff yarn is characterized in that the yarn is made of animal hair-like fluff having needle-shaped fluff ends, and the constituent filaments are intertwined with each other. 2. After running at least one thread of thermoplastic synthetic fiber multifilament yarn in contact with a heating element,
When feeding the multifilament yarn to the fluid entangling device, the temperature of the heating element is made to run in contact with the multifilament yarn for a time that does not uniformly spread to all the yarns, so that the elongation increase rate of the part that becomes fluff is at least 20% or more. After being heat-treated to impart a weak point that can be partially stretched and cut, it is continuously or separately supplied to a fluid entangling device, and the weak point is stretched and cut with a fluid to fluff and simultaneously impart entanglement. A method for producing animal hair-like fluff yarn.