JPS6111332B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) This invention relates to a special bundled spun yarn, more specifically, it has a structure in which some of the constituent fibers are fused and has a good shaving feel. The present invention relates to a partially fused bound spun yarn which can provide a fabric using the yarn with good optical selectivity and uniformity on the surface of the fabric, and is also resistant to ironing.

(Prior Art) In recent years, various spinning methods using temporary twisting have begun to be studied.

Spinning systems using these temporary twists do not require the process of applying real twists due to the principle of yarn formation, so it is possible to speed up the process, reduce costs, etc., and has great industrial merits. The spun yarn itself has a yarn structure that cannot be obtained by conventional ring spinning or open-end spinning, so it is attracting attention as a new spun yarn with added value that is difficult to obtain with conventional yarns. There is.

More or less, the yarn forming principle of the spinning method using temporary twist is typically to feed a staple fiber bundle drafted at a high magnification from a front roller, and then apply temporary twist downstream of the front roller. However, the tensioning action caused by the temporary twisting is transmitted to the vicinity of the front roller to form a twisted fiber bundle consisting of the majority of staple fibers, and the surface layer or near the outer periphery of the twisted fiber bundle is The staple fiber bundle is not substantially twisted, or even if it is twisted, the degree of twisting is small, or the entire length of one staple fiber is not twisted. , a small number of staple fibers are generated, and as the spun fiber bundle unravels, the small number of staple fibers automatically forms a random or helical pattern around the fiber bundle, which becomes substantially empty. The yarn obtained by this system is generally called "bound spun yarn" (fabric spun yarn) because it has a yarn structure such as this, and is wound and bundled to form a spun yarn. This is why it is called schiated yarn.

(Problem that the invention attempts to solve) 〓〓〓〓
Generally speaking, the above-mentioned bound spun yarn tends to have an uneven shape when viewed from the yarn side direction in the yarn longitudinal direction due to the binding structure. Due to its structure, fabrics using this yarn generally have a strong rough feel and poor photoselectivity, and the fabric surface also lacks uniformity.

The purpose of the present invention is to improve the technology for producing yarn using a bundled spinning system that basically utilizes temporary twisting as described above, and to improve the technology of producing yarn by using a bundled spinning system that basically utilizes temporary twisting, and which has unique features that cannot be obtained by using conventional bundled spun yarns. The purpose of the present invention is to provide a special bound spun yarn that can provide a fabric using the yarn with a smooth feel, optical selectivity, and good uniformity of the fabric surface, and is resistant to straining.

(Means for Solving the Problems) The above-mentioned object is achieved by the following partially fused bound spun yarn of the present invention.

That is, it is a bound spun yarn mainly composed of thermoplastic synthetic fiber staples, in which bundled staple fibers are wound around a core fiber bundle, and the bundled staple fibers form a group and the binding direction of the bundled fiber group is are wound around and bundled around the core fiber bundle in a substantially fixed direction, some of the constituent fibers are fused, and the constituent fibers of the core fiber bundle are approximately parallel to each other. This is a partially fused and bound spun yarn characterized by having a substantially straight shape as a whole yarn.

(Function) This invention will be explained in more detail below with reference to drawings and the like.

The partially fused bound spun yarn of the present invention is mainly composed of thermoplastic synthetic fiber staples, but may also contain continuous filaments in the core fiber bundle.

FIG. 1 is a schematic side view showing an example of a method for manufacturing a partially fused bundled spun yarn of the present invention; FIG. 2 is a schematic side view illustrating an example of a manufacturing process for a bound spun yarn; The figure is a side view of a bundled spun yarn before fusion treatment, and FIG. 4 is a side view of a partially fused bundled spun yarn according to the present invention after fusion treatment.

In the example of the manufacturing method shown in FIG. 8 and then wound into winder 9.

In an example of this manufacturing method, a bundled spun yarn containing a small amount of a low melting point fiber component is used,
For example, the main fiber component and the low melting point fiber component are
It may be a mixture of different fibers and spun, or a composite fiber consisting of a main fiber component and a low melting point component.

Then, the heater 5 adjusts the temperature so that the bundled spun yarn is heated to a temperature near or above the melting point of the low melting point fiber component at which the main fiber component does not undergo melting or thermal decomposition. Further, for example, a temporary twisting device 6 may be provided between the feed roller 4 and the delivery roller 7 to apply vibration to the bundled spun yarn. Since the temporary twisting device in this case is for applying vibration to the yarn, other vibration applying devices may be used. When the yarn is heated while being vibrated in this way, the heating efficiency is improved and the length of the heater can be shortened.

The partially fused bound spun yarn of the present invention obtained in this manner has a part of the constituent fibers fused, and the fused yarn generally has a unique crisp feel. It is also extremely resistant to physical exertion. In addition, when the yarn is heat-treated under tension, the third
The unevenness of the bundled spun yarn as shown in the figure is improved, the parallelism of the constituent fibers of the core fiber bundle is improved as shown in Figure 4, and the unevenness of the bundle or yarn form is reduced. If the core fiber bundle has a slight alternating twist before the heat treatment, although it is substantially non-null, the alternating twist can be almost eliminated. In addition, the third
In the figure and FIG. 4, 21 is a bundled staple fiber, and 22 is a core fiber bundle.

As described above, the bound spun yarn of the present invention is
Some of the constituent fibers are fused, and the constituent fibers of the core fiber bundle are almost parallel to each other, so that the yarn as a whole has a substantially straight shape.As a partially fused bound spun yarn. That's what you get.

In the partially fused bundled spun yarn of the present invention, as shown in the model in FIGS. 3 and 4, the bundled staple fibers 21 form a group, and the winding direction of the bundled fiber group is substantially It is necessary to wrap and bind the core fiber bundle 22 in the same direction.
Ru. In other words, originally, yarn strength can only be obtained by wrapping and tying bundled fibers in the S and Z winding directions, which are not constant, or at various random winding angles under such non-uniform winding directions. Even if the constituent fibers of such spun yarns were fused together, in reality, it would only increase the roughness and hardness.
Further, since the parallelism of the fibers constituting the core fiber bundle does not appear on the yarn surface and the binding fibers also exist in random directions, it is not possible to obtain a good glossy feeling, and at the same time, a good crisp feeling cannot be obtained.

That is, as mentioned above, core fiber bundles are wound and bound at various random winding angles under the S and Z winding directions that are not constant when binding fibers are used, or in such inconsistent winding directions. For spun yarns that have high yarn strength, even if the yarns are heat-treated under tension or fused by heat treatment, the effect of improving the binding state and yarn form of the spun yarns is almost negligible. It's something I can't really hope for.

In addition, in the above-mentioned example of the method for manufacturing the yarn of this invention, the torque also decreases in the yarn that has torque before the heat treatment,
Furthermore, when a raw material staple having some heat shrinkability is used, the parallelism of the constituent fibers of the core fiber bundle is further improved and the bundle is also improved. In addition, if there is a part where the binding state is too strong before the heat treatment, it is possible to work in the direction of loosening the too strong binding state in that part to some extent and making it uniform.

In the present invention, the bundled spun yarn to be subjected to heat treatment is, for example, a roving 1 in which a high melting point main fiber component and a low melting point fiber component are mixed, as shown in FIG.
0 to guide 11, draft parts 12, 13, 1
4, the winder 2 via the suction device 15, the air provisioning device 16, the delivery roller 17, and the guide 19.
In this case, the amount of the low melting point component in the trial bound spun yarn is about 3 to 20% of the weight of the yarn, preferably 5%.
~10% is appropriate, but it is not essential to use the two components with the high and low melting points, and the conventional one
As with the partially fused spun yarn consisting of several components, it is also possible to obtain the partially fused bundled spun yarn of the present invention even with a single component by appropriately setting the heat treatment temperature.

In the present invention, the heat treatment may be performed only after the yarn has passed through the temporary twisting device, and the heat treatment may be performed on the bundled spun yarn that has just been wound as in the above example. However, it is also possible to provide a heating device such as a heater directly connected to the bundled spun yarn forming area to continuously process the yarn before taking it up or winding it up.

(Example) 3d x 89 made of polyethylene terephthalate
mm staple fibers and 2D x 89 mm staple fibers made of a polymer obtained by copolymerizing polyethylene terephthalate and polyethylene isophthalate at a ratio of 80:20 are blended at a weight ratio of 95:5. The roving was produced through the process of yarn spinning. Using this roving, a yarn was manufactured according to the process for manufacturing a bundled spun yarn shown in FIG. The resulting bundled spun yarn had a size of 1/60 and had a form as shown in FIG. 3.

The yarn was heat-treated and wound using the apparatus shown in Fig. 1 under processing conditions such as a feed roller speed of 100 m/min, an elongation rate of 5% under tension, a hot plate length of 150 cm, and a hot plate temperature of 220°C. Ivy.

As shown in FIG. 4, the resulting bundled spun yarn exhibits a state in which the parallelism of the fibers constituting the core fiber bundle is substantially parallel to each other, which is significantly improved compared to before the heat treatment. In addition, some of the constituent fibers were fused, and when made into a cloth, it had a special smooth feel and good luster, and the cloth had a smooth and uniform surface. This thread was also strong against laddering.

(Effects of the Invention) As described above, the partially fused spun yarn of the present invention provides a unique smooth feel and gloss that cannot be obtained using conventional spun bundle yarns, and good uniformity of the fabric surface. A special bound spun yarn that can be applied to fabrics using the yarn and is resistant to ironing is provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic side view showing an example of a method for manufacturing a partially fused bundled spun yarn of the present invention; FIG. 2 is a schematic side view illustrating an example of a manufacturing process for a bound spun yarn; The figure is a side view of a bundled spun yarn before fusion treatment, and FIG. 4 is a side view of a partially fused bundled spun yarn according to the present invention after fusion treatment. 1: Tied spun yarn cheese, 2: Feed roller,
〓〓〓〓
5: heater, 6: temporary twisting device, 7: delivery roller, 9: winding device, 10: roving, 12 to 14: draft part, 15: suction device, 16: temporary twisting device, 17: delivery roller, 20: winding collecting device, 2
1: Bundled staple fiber, 22: Core fiber bundle. 〓〓〓〓

Claims (1)

[Claims] 1 A bound spun yarn mainly composed of thermoplastic synthetic fiber staples, in which bound staple fibers are wound around a core fiber bundle, wherein the bound staple fibers form a group and the winding direction of the bound fiber group is The core fiber bundle is wound around the core fiber bundle in a substantially fixed direction and is bundled, and some of the constituent fibers are fused and the constituent fibers of the core fiber bundle are substantially parallel to each other. A partially fused and bound spun yarn characterized in that the yarn as a whole has a substantially straight shape.